danwdart / oeis

OEIS for Node.js

OEIS

Connects and extracts information from the OEIS database located at http://oeis.org

Using

Assuming methodname is the method you wish to use:

ES5

var method = require('oeis').methodname;

ES2015+

import methodname from 'oeis';

Methods

searchBySequence: search for a number sequence

Parameter: Array for the sequence, optional integer for the search start

Returns: Promise (resolving an object, rejecting an HTTP error)

Example:

oeis.searchBySequence([1,1,2,3,5]) .then((obj) => console.log(obj));

searchByID: search for a specific sequence by ID

Input: integer

Returns: Promise (resolving an object, rejecting an HTTP error)

Example:

oeis.searchByID(42) .then((obj) => console.log(obj));

plot: returns a HTML or PNG plot of a sequence by number

Input: integer (sequence number), boolean (whether to return PNG)

Returns: Promise (resolving HTML or PNG data, rejecting an HTTP error)

Example:

oeis.plot(42, true) .then((pngData) => console.log(pngData));

Credits

Written by Dan Dart [e-mail]

I stole the endpoints from this Stack Overflow post:

http://stackoverflow.com/a/38421600/1764563