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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.

A251807 Number of (7+1)X(n+1) 0..3 arrays with no 2X2 subblock having x11-x00 less than x10-x01.

Table of values

n a(n)
1 305991368
2 310512400748
3 114701510008550
4 20552060379396424
5 2134102396738819286
6 144607697103715449366
7 6950854990205965398511
8 251944939127223553670932
9 7212104449092454367810317

List of values

[305991368, 310512400748, 114701510008550, 20552060379396424, 2134102396738819286, 144607697103715449366, 6950854990205965398511, 251944939127223553670932, 7212104449092454367810317]

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

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