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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.

A195218 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 6 or less and triangles differing by a constant counted only once.

Table of values

n a(n)
1 1
2 127
3 117585
4 845613769
5 47764170577925
6 21369796486647028143
7 76019997788404353762724447
8 2155668406192527252815282495516543

List of values

[1, 127, 117585, 845613769, 47764170577925, 21369796486647028143, 76019997788404353762724447, 2155668406192527252815282495516543]

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

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