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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.

A195228 Number of lower triangles of an n X n 0..4 array with each element differing from all of its diagonal, vertical, antidiagonal and horizontal neighbors by one or less.

Table of values

n a(n)
1 5
2 29
3 337
4 7705
5 348849
6 31374671
7 5618308863
8 2006626824777
9 1431393426377379
10 2041526404394580503
11 5826929219460553056125
12 33306813274969071019847237
13 381509343842237775318179191165
14 8761682347863104757428803661222769

List of values

[5, 29, 337, 7705, 348849, 31374671, 5618308863, 2006626824777, 1431393426377379, 2041526404394580503, 5826929219460553056125, 33306813274969071019847237, 381509343842237775318179191165, 8761682347863104757428803661222769]

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

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