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 A219006 #5 Jul 23 2025 00:10:38 %S A219006 1,454,17776,461681,13259232,401608939,12030873701,357976038469 %N A219006 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..2 5Xn array. %C A219006 Row 5 of A219002 %e A219006 Some solutions for n=3 %e A219006 ..0..0..1....1..1..1....0..0..0....0..0..1....1..1..0....1..0..0....1..0..0 %e A219006 ..0..0..1....0..0..0....1..1..1....0..0..1....0..0..0....0..1..0....1..0..0 %e A219006 ..1..0..1....1..1..1....1..0..1....0..1..1....0..1..0....1..1..1....1..1..0 %e A219006 ..1..0..1....1..0..1....0..0..0....1..0..0....1..1..0....0..0..1....1..0..1 %e A219006 ..0..1..0....0..1..0....1..0..1....0..0..0....1..0..1....0..0..1....0..1..0 %K A219006 nonn %O A219006 1,2 %A A219006 _R. H. Hardin_ Nov 09 2012