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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.

A267021 Number of nX(n+1) arrays of permutations of n+1 copies of 0..n-1 with every element equal to or 1 greater than any northeast or northwest neighbors modulo n and the upper left element equal to 0.

Table of values

n a(n)
1 1
2 10
3 59
4 759
5 18157
6 912057
7 100710495

List of values

[1, 10, 59, 759, 18157, 912057, 100710495]

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