sloane: A command line interface to Sloane's On-Line Encyclopedia of Integer Sequences

[ bsd3, math, program ] [ Propose Tags ]

A command line interface to Sloane's On-Line Encyclopedia of Integer Sequences. For usage see http://github.com/akc/sloane.


[Skip to Readme]

Downloads

Maintainer's Corner

Package maintainers

For package maintainers and hackage trustees

Candidates

  • No Candidates
Versions [RSS] 0.1, 0.1.1, 0.1.2, 0.1.3, 0.1.4, 0.1.5, 1.1, 1.3, 1.4, 1.5, 1.5.1, 1.6, 1.7, 1.7.1, 1.8, 1.8.2, 1.9.1, 1.9.2, 1.9.3, 2.0.0, 2.0.1, 2.0.2, 2.0.3, 2.0.4, 2.0.5, 4.0.0, 4.0.1, 4.0.2, 4.1.0, 4.1.2, 4.2.0, 5.0.0, 5.0.1
Change log CHANGELOG.md
Dependencies ansi-terminal (>=0.6), base (>=3 && <5), bytestring (>=0.9), directory (>=1.2), filepath (>=1.3), HTTP (>=4000.0.9), network (>=2.4), optparse-applicative (>=0.9), stringsearch (>=0.3), terminal-size (>=0.2), time (>=1.4), zlib (>=0.5) [details]
License BSD-3-Clause
Author Anders Claesson
Maintainer anders.claesson@gmail.com
Category Math
Home page http://github.com/akc/sloane
Source repo head: git clone git://github.com/akc/sloane.git
Uploaded by AndersClaesson at 2014-06-11T09:56:43Z
Distributions
Reverse Dependencies 1 direct, 0 indirect [details]
Executables sloane
Downloads 22519 total (46 in the last 30 days)
Rating (no votes yet) [estimated by Bayesian average]
Your Rating
  • λ
  • λ
  • λ
Status Docs not available [build log]
Successful builds reported [all 7 reports]

Readme for sloane-1.8

[back to package description]

title: SLOANE(1) Sloane User Manual | Version 1.8 date: May 27, 2014

NAME

sloane - a command line interface to Sloane's On-Line Encyclopedia of Integer Sequences http://oeis.org

SYNOPSIS

sloane [-a | --all | -k keys | --url] [-n entries] search-terms ...
sloane (--update | --version | --help)
sloane

DESCRIPTION

The sloane command searches Sloane's On-Line Encyclopedia of Integer Sequences (OEIS). The search terms are typically the leading term of a sequence. For example,

sloane 1,1,2,5,15,52,203,877,4140

returns entry A000110 (Bell numbers), and four more entries. One can also search by sequence id (A-number), or even search for arbitrary words. See the EXAMPLES section.

If no search terms are specified the standard input is read line-by-line. In this mode the search is done locally against a downloaded list of known sequences. If the sequence is in the OEIS, then it is returned to the standard output; if not, it is ignored. This way sloane can quickly filter out the sequences from the input that are in the OEIS. Assuming that FILE contains one sequence per line,

sloane <FILE

returns the subset of the sequences in FILE that are in the OEIS. To also look-up the names of those sequences in the OEIS one could, for instance, run

sloane <FILE | xargs -L1 --verbose sloane

Sloane normally crops long lines to fit the widths of the terminal. If this is unwanted, pipe the output through cat.

OPTIONS

-a, --all : Print all fields

-k keys : Keys of fields to print (default: SN)

--url : Print URLs of found entries (but nothing else)

-n entries : Fetch at most this many entries (default: 5)

--update : Update the local sequence cache

--version : Print version information

--help : Display a short help message

EXAMPLES

The most common search is for entries matching a sequence of consecutive terms:

sloane 1,3,19,183,2371,38703

At the time of writing this particular query would return

S A006531 1,1,3,19,183,2371,38703,763099,17648823,468603091,14050842303,
N A006531 Semiorders on n elements.

As this illustrates, the default is to return just the sequence (S) and the name (N) fields. To override the default one can use the keys option. For instance, the following search shows the sequence, name, comments, and formula fields of the sequence whose A-number is A006531:

sloane -k SNCF id:A006531

The next example returns at most 3 results of a free text search:

sloane -n 3 "(2+2)-free posets"

To view the full entries of these 3 results in a browser (e.g., Firefox) one can use the url option:

firefox `sloane --url -n 3 "(2+2)-free posets"`

In the final example the local cache is used to filter out sequences from the standard input that are in the OEIS:

sloane <<END
1,2,3,6,11,23,47,106,235           # Comma separated integers
1 2 444 90 120                     # Space separated integers
'(3 9 27 88 123)                   # S-expression
[2,3,5,7,11,13,17,19,23,29,31,37]  # Haskell list
[1; 1; 2; 3; 5; 8; 13; 21]         # O'Caml list
{1, -1, 2, -6, 24, -120, 720}      # Mathematica list
END

The '#' character and any text after it is ignored by sloane. Note also that sloane is quite liberal in the formatting of sequences it accepts.

KEYS

These are the keys used by OEIS http://oeis.org/eishelp2.html.

I  ID number

S  1st line of unsigned sequence
T  2nd line of unsigned sequence
U  3rd line of unsigned sequence

V  1st line of signed sequence
W  2nd line of signed sequence
X  3rd line of signed sequence

N  Name
C  Comments
D  References
H  Links
F  Formula
e  Examples

p  Maple program
t  Mathematica program
o  Program in other language

Y  Cross-references
K  Keywords
O  Offset
A  Author
E  Extensions and errors

NOTES

Please use this program with moderation as not to overburden the OEIS-server; see OEIS' policy on searching the database: http://oeis.org/wiki/Welcome#Policy_on_Searching_the_Database.

SEE ALSO

The sloane source code may be downloaded from https://github.com/akc/sloane.

AUTHOR

Anders Claesson http://akc.is