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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.

A195273 Number of lower triangles of an n X n integer array with each element differing from all of its vertical and horizontal neighbors by 3 or less and triangles differing by a constant counted only once.

Table of values

n a(n)
1 1
2 49
3 11319
4 12608631
5 68604760497
6 1833160598134397
7 241338657495589799523
8 156865927758847103008175635
9 504091149328239931994947830412175

List of values

[1, 49, 11319, 12608631, 68604760497, 1833160598134397, 241338657495589799523, 156865927758847103008175635, 504091149328239931994947830412175]

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

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