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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.

A230175 Number of nX7 0..2 arrays x(i,j) with each element horizontally, vertically, diagonally or antidiagonally next to at least one element with value 2-x(i,j).

Table of values

n a(n)
1 63
2 530771
3 704822331
4 1027868078181
5 1514677019365483
6 2222884630214739547
7 3274958849115023706081
8 4822680345112751878337083
9 7098618594645882579322969411
10 10449577732703043756255819628725

List of values

[63, 530771, 704822331, 1027868078181, 1514677019365483, 2222884630214739547, 3274958849115023706081, 4822680345112751878337083, 7098618594645882579322969411, 10449577732703043756255819628725]

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

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