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 A219308 #5 Jul 23 2025 00:22:07 %S A219308 21,405,9233,200376,4215579,89981627,1935133104,41520773667, %T A219308 888957906061,19043081452793,408152775865291,8747035260806150, %U A219308 187430143072289130,4016312124315997845,86065761676864158937 %N A219308 Unchanging value maps: number of nX6 binary arrays indicating the locations of corresponding elements unequal to no horizontal or vertical neighbor in a random 0..2 nX6 array. %C A219308 Column 6 of A219310 %e A219308 Some solutions for n=3 %e A219308 ..0..1..1..0..0..1....1..0..0..0..0..0....1..0..0..0..0..0....0..0..1..1..0..0 %e A219308 ..0..0..1..1..0..0....0..0..1..1..0..0....1..0..0..1..0..0....0..0..1..1..1..0 %e A219308 ..0..0..0..1..1..0....0..0..0..1..1..1....1..0..0..0..0..1....0..0..0..1..0..0 %K A219308 nonn %O A219308 1,1 %A A219308 _R. H. Hardin_ Nov 17 2012