cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A201809 Number of arrays of n integers in -6..6 with sum zero and equal numbers of elements greater than zero and less than zero.

Table of values

n a(n)
1 1
2 13
3 37
4 949
5 4501
6 99961
7 637393
8 12004357
9 93039589
10 1554288913
11 13794790153
12 211729119889
13 2069010499921
14 29916152015413
15 313278539674477
16 4343800080821797
17 47825160489621541
18 643987273822751329

List of values

[1, 13, 37, 949, 4501, 99961, 637393, 12004357, 93039589, 1554288913, 13794790153, 211729119889, 2069010499921, 29916152015413, 313278539674477, 4343800080821797, 47825160489621541, 643987273822751329]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

Content is available under The OEIS End-User License Agreement.