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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.

A230679 Number of 5 X n 0..2 arrays x(i,j) with each element horizontally, diagonally or antidiagonally next to at least one element with value 2-x(i,j).

Table of values

n a(n)
1 0
2 2247
3 251595
4 28368687
5 4022141121
6 559929294657
7 77282148036051
8 10681855554910983
9 1476794401334027865
10 204155617303878631797
11 28222820785777362856803
12 3901584177313433415004191

List of values

[0, 2247, 251595, 28368687, 4022141121, 559929294657, 77282148036051, 10681855554910983, 1476794401334027865, 204155617303878631797, 28222820785777362856803, 3901584177313433415004191]

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

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