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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.

A194994 Number of lower triangles of an n X n 0..4 array with each element differing from all of its horizontal and vertical neighbors by one.

Table of values

n a(n)
1 5
2 14
3 66
4 458
5 4990
6 81014
7 2059822
8 78060014
9 4641074078
10 410310652370
11 57068977108754
12 11768868532345686
13 3829513291002131546
14 1842092248483706146126
15 1402261360946084657783246

List of values

[5, 14, 66, 458, 4990, 81014, 2059822, 78060014, 4641074078, 410310652370, 57068977108754, 11768868532345686, 3829513291002131546, 1842092248483706146126, 1402261360946084657783246]

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

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