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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.

A218996 Unmatched value maps: number of n X n binary arrays indicating the locations of corresponding elements not equal to any horizontal, diagonal or antidiagonal neighbor in a random 0..2 n X n array.

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%I A218996 #7 Jul 23 2025 00:09:25
%S A218996 1,10,328,31857,13259232,22776074699
%N A218996 Unmatched value maps: number of n X n binary arrays indicating the locations of corresponding elements not equal to any horizontal, diagonal or antidiagonal neighbor in a random 0..2 n X n array.
%C A218996 Diagonal of A219002
%e A218996 Some solutions for n=3
%e A218996 ..0..0..0....0..0..1....0..0..0....1..1..0....0..1..0....1..1..1....1..0..0
%e A218996 ..0..0..1....0..0..1....1..0..0....0..0..1....0..0..1....0..0..1....1..0..1
%e A218996 ..1..1..0....0..1..1....0..1..0....1..0..1....1..1..1....0..0..0....0..0..0
%K A218996 nonn
%O A218996 1,2
%A A218996 _R. H. Hardin_ Nov 09 2012

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