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.

A188227 Number of nondecreasing arrangements of n numbers in -(2n-2)..(2n-2) with sum zero and not more than two numbers equal.

Table of values

n a(n)
1 1
2 3
3 12
4 81
5 598
6 4859
7 41748
8 374820
9 3475284
10 33053399
11 320869264
12 3167899567
13 31721907390
14 321494911644
15 3292220700520
16 34018798556265
17 354312456839426
18 3716173628641396
19 39220841304052510
20 416264662788000213

List of values

[1, 3, 12, 81, 598, 4859, 41748, 374820, 3475284, 33053399, 320869264, 3167899567, 31721907390, 321494911644, 3292220700520, 34018798556265, 354312456839426, 3716173628641396, 39220841304052510, 416264662788000213]

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

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