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 A219440 #6 Jul 23 2025 00:27:39 %S A219440 37,543,15255,326938,7285283,160436482,3553813654,78682793897, %T A219440 1739719764661,38456568548417,850199779863242,18798233014587802, %U A219440 415629248838802678,9189326940591712179,203170331059931678345 %N A219440 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..1 nX7 array. %C A219440 Column 7 of A219441 %H A219440 R. H. Hardin, <a href="/A219440/b219440.txt">Table of n, a(n) for n = 1..21</a> %e A219440 Some solutions for n=3 %e A219440 ..0..0..0..1..0..1..0....0..0..0..0..1..0..0....1..0..0..0..0..1..1 %e A219440 ..1..0..0..0..0..0..0....0..1..0..0..1..0..0....0..0..0..1..0..1..1 %e A219440 ..1..0..0..0..1..0..1....0..0..0..0..1..0..0....0..1..0..1..1..1..1 %K A219440 nonn %O A219440 1,1 %A A219440 _R. H. Hardin_ Nov 20 2012