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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.

A195219 Number of lower triangles of an n X n integer array with each element differing from all of its diagonal, vertical, antidiagonal and horizontal neighbors by 7 or less and triangles differing by a constant counted only once.

Table of values

n a(n)
1 1
2 169
3 239891
4 3048698613
5 350767341744137
6 368448539594713382337
7 3546881146489163009435488735

List of values

[1, 169, 239891, 3048698613, 350767341744137, 368448539594713382337, 3546881146489163009435488735]

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

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