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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.

A199701 Number of -5..5 arrays x(0..n-1) of n elements with zero sum and no two neighbors equal.

Table of values

n a(n)
1 1
2 10
3 82
4 724
5 6504
6 59992
7 559028
8 5252900
9 49700882
10 472873888
11 4519281222
12 43353372676
13 417214414596
14 4026070558436
15 38943205468034
16 377469980604452
17 3665456335373858
18 35651726951195532
19 347268836196275908

List of values

[1, 10, 82, 724, 6504, 59992, 559028, 5252900, 49700882, 472873888, 4519281222, 43353372676, 417214414596, 4026070558436, 38943205468034, 377469980604452, 3665456335373858, 35651726951195532, 347268836196275908]

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

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