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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.

A125537 Number of n X n arrays with entries in 1..7 in which adjacent entries differ by 4 or less (adjacent means in x or y directions).

Table of values

n a(n)
0 1
1 7
2 1527
3 11721313
4 3050388738539
5 27037458180935427547
6 8157016618633297682357104957
7 83768469285967811192253950787571671419
8 29282610870399702055320868574328652947738735891523

List of values

[1, 7, 1527, 11721313, 3050388738539, 27037458180935427547, 8157016618633297682357104957, 83768469285967811192253950787571671419, 29282610870399702055320868574328652947738735891523]

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

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