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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.

A250909 Number of (n+1)X(4+1) 0..2 arrays with no 2X2 subblock having its maximum diagonal element less than its minimum antidiagonal element.

Table of values

n a(n)
1 39960
2 6621219
3 1096982379
4 181725094746
5 30104106257115
6 4986961280614953
7 826125782084148708
8 136853637633971644347
9 22670782687226177355267
10 3755577099313037361116844
11 622138174177304855831638383

List of values

[39960, 6621219, 1096982379, 181725094746, 30104106257115, 4986961280614953, 826125782084148708, 136853637633971644347, 22670782687226177355267, 3755577099313037361116844, 622138174177304855831638383]

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

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