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 A219000 #5 Jul 23 2025 00:09:45 %S A219000 21,2341,127401,7027671,401608939,22776074699 %N A219000 Unmatched value maps: number of nX6 binary arrays indicating the locations of corresponding elements not equal to any horizontal, diagonal or antidiagonal neighbor in a random 0..2 nX6 array. %C A219000 Column 6 of A219002 %e A219000 Some solutions for n=3 %e A219000 ..0..0..0..0..0..1....0..1..1..0..1..0....0..1..1..1..1..0....0..0..0..1..0..1 %e A219000 ..1..0..0..1..0..0....1..0..0..0..0..0....1..0..0..0..0..1....0..0..1..0..0..0 %e A219000 ..0..0..0..1..1..0....1..0..1..0..1..1....1..0..1..0..0..0....0..0..1..0..1..1 %K A219000 nonn %O A219000 1,1 %A A219000 _R. H. Hardin_ Nov 09 2012