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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.

A195253 Number of lower triangles of a 7X7 0..n array with each element differing from all of its diagonal, vertical, antidiagonal and horizontal neighbors by two or less.

Table of values

n a(n)
1 268435456
2 22876792454961
3 254948725307650
4 786909681200387
5 1479091549959182
6 2226347741716207
7 2987571816007840
8 3751562406061261
9 4515974674903982
10 5280435818615649
11 6044900876514412
12 6809366105107111

List of values

[268435456, 22876792454961, 254948725307650, 786909681200387, 1479091549959182, 2226347741716207, 2987571816007840, 3751562406061261, 4515974674903982, 5280435818615649, 6044900876514412, 6809366105107111]

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

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