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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.

A207555 Number of 7Xn 0..2 arrays avoiding the pattern z-2 z-1 z in any row, column, nw-to-se diagonal or ne-to-sw antidiagonal.

Table of values

n a(n)
1 1791
2 3207681
3 3323115736
4 3168082336959
5 3054158366460488
6 2964756265273648883
7 2876868686935789680075
8 2790347210410991592878863
9 2705587415313932036439553600
10 2623332913249978851468865268215

List of values

[1791, 3207681, 3323115736, 3168082336959, 3054158366460488, 2964756265273648883, 2876868686935789680075, 2790347210410991592878863, 2705587415313932036439553600, 2623332913249978851468865268215]

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

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