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.
%I A219443 #6 Jul 23 2025 00:28:00 %S A219443 1,134,1396,11283,98584,844553,7285283,63351821,550075610,4785295684, %T A219443 41593658285,361645238004,3144201225435,27338782908435, %U A219443 237713376159763,2066953339295080,17972428400647700,156272292427772867 %N A219443 Unmatched value maps: number of 5Xn binary arrays indicating the locations of corresponding elements not equal to any horizontal, diagonal or antidiagonal neighbor in a random 0..1 5Xn array. %C A219443 Row 5 of A219441 %H A219443 R. H. Hardin, <a href="/A219443/b219443.txt">Table of n, a(n) for n = 1..25</a> %e A219443 Some solutions for n=3 %e A219443 ..0..0..1....1..0..1....0..0..1....0..0..0....0..0..0....1..1..1....0..0..1 %e A219443 ..0..0..0....1..0..0....1..0..1....0..1..0....0..0..1....0..0..0....1..0..1 %e A219443 ..0..0..1....0..0..1....0..0..1....0..1..0....0..0..0....0..0..0....1..0..0 %e A219443 ..0..0..1....0..0..0....0..0..0....0..0..0....1..0..1....0..0..1....1..0..1 %e A219443 ..1..0..1....0..0..0....0..0..0....1..0..0....1..0..0....1..0..0....0..0..1 %K A219443 nonn %O A219443 1,2 %A A219443 _R. H. Hardin_ Nov 20 2012