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.

A269195 Number of n X n 0..3 arrays with some element plus some horizontally, diagonally or antidiagonally adjacent neighbor totalling three no more than once.

Table of values

n a(n)
1 4
2 180
3 25572
4 15289548
5 34838403756
6 320994710282892
7 12093315071771856492
8 1887658657444603460395332
9 1230222115345954315761363474780
10 3366670969596963372379333414861881876

List of values

[4, 180, 25572, 15289548, 34838403756, 320994710282892, 12093315071771856492, 1887658657444603460395332, 1230222115345954315761363474780, 3366670969596963372379333414861881876]

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

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