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.

A188231 Number of nondecreasing arrangements of n numbers in -(n+2)..(n+2) with sum zero and not more than two numbers equal.

Table of values

n a(n)
1 1
2 5
3 17
4 81
5 374
6 1818
7 8964
8 45225
9 231596
10 1202495
11 6313385
12 33473871
13 178991409
14 964308854
15 5229780968
16 28531772394
17 156491164870
18 862470267275
19 4774186037351
20 26533145487533
21 148001670048543
22 828332995017980

List of values

[1, 5, 17, 81, 374, 1818, 8964, 45225, 231596, 1202495, 6313385, 33473871, 178991409, 964308854, 5229780968, 28531772394, 156491164870, 862470267275, 4774186037351, 26533145487533, 148001670048543, 828332995017980]

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

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