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.

A269145 Number of n X n 0..3 arrays with some element plus some horizontally, antidiagonally or vertically adjacent neighbor totalling three exactly once.

Table of values

n a(n)
1 0
2 80
3 13904
4 7002040
5 12637025328
6 88082672552208
7 2456638851763181776
8 279573979783982763379528
9 131383670545605944288719844352
10 256961574793195204388371517319842144

List of values

[0, 80, 13904, 7002040, 12637025328, 88082672552208, 2456638851763181776, 279573979783982763379528, 131383670545605944288719844352, 256961574793195204388371517319842144]

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

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