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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.

A219001 Unmatched value maps: number of nX7 binary arrays indicating the locations of corresponding elements not equal to any horizontal, diagonal or antidiagonal neighbor in a random 0..2 nX7 array.

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%I A219001 #5 Jul 23 2025 00:09:52
%S A219001 37,9019,966981,105807897,12030873701
%N A219001 Unmatched value maps: number of nX7 binary arrays indicating the locations of corresponding elements not equal to any horizontal, diagonal or antidiagonal neighbor in a random 0..2 nX7 array.
%C A219001 Column 7 of A219002
%e A219001 Some solutions for n=3
%e A219001 ..0..0..0..0..1..0..1....0..0..0..0..1..1..1....0..1..0..1..0..0..1
%e A219001 ..0..0..0..1..1..0..0....0..0..1..1..1..1..1....0..0..1..1..0..1..1
%e A219001 ..0..1..1..0..0..1..0....0..0..1..0..0..0..0....0..1..1..1..1..0..1
%K A219001 nonn
%O A219001 1,1
%A A219001 _R. H. Hardin_ Nov 09 2012

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