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 A219435 #7 Jul 23 2025 00:27:05 %S A219435 1,6,78,1750,98584,12323337,3553813654,2370435069040,3599403810329586 %N A219435 Unmatched value maps: number of n X n binary arrays indicating the locations of corresponding elements not equal to any horizontal, diagonal or antidiagonal neighbor in a random 0..1 n X n array. %C A219435 Diagonal of A219441 %e A219435 Some solutions for n=3 %e A219435 ..1..0..1....1..1..1....1..0..0....1..0..1....1..0..0....0..0..0....0..0..0 %e A219435 ..0..0..1....0..0..0....0..0..0....0..0..1....0..0..1....0..0..0....1..0..1 %e A219435 ..1..0..0....0..0..0....0..0..1....0..0..1....1..0..1....1..1..1....1..1..1 %K A219435 nonn %O A219435 1,2 %A A219435 _R. H. Hardin_ Nov 20 2012