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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.

A235672 Number of (n+1)X(n+1) 0..1 arrays with the difference between each 2X2 subblock maximum and minimum lexicographically nondecreasing columnwise and nonincreasing rowwise.

Table of values

n a(n)
1 16
2 380
3 28584
4 6894210
5 5376199876
6 13578805464958
7 111141360154581108
8 2948319928633417670416
9 253497281472306754538416318
10 70644048705639953560633398930712

List of values

[16, 380, 28584, 6894210, 5376199876, 13578805464958, 111141360154581108, 2948319928633417670416, 253497281472306754538416318, 70644048705639953560633398930712]

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

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