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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.

A229846 Number of nX7 0..2 arrays x(i,j) with each element horizontally or vertically next to at least one element with value 2-x(i,j).

Table of values

n a(n)
1 63
2 63291
3 31783299
4 17324310663
5 9366963651897
6 5071373978989773
7 2745117942652795617
8 1485981308554100717397
9 804382842721296064467525
10 435424391066549741979527775
11 235701650566916249474911785897

List of values

[63, 63291, 31783299, 17324310663, 9366963651897, 5071373978989773, 2745117942652795617, 1485981308554100717397, 804382842721296064467525, 435424391066549741979527775, 235701650566916249474911785897]

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

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