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 A218820 #5 Jul 23 2025 00:06:01 %S A218820 12,337,5529,80692,1229783,18519049,280040904,4229571209,63907047147, %T A218820 965490629060,14586966316231,220382236868025 %N A218820 Unmatched value maps: number of nX5 binary arrays indicating the locations of corresponding elements not equal to any king-move neighbor in a random 0..2 nX5 array. %C A218820 Column 5 of A218823 %e A218820 Some solutions for n=3 %e A218820 ..1..1..0..1..0....1..0..0..0..0....0..1..1..1..0....0..1..0..1..0 %e A218820 ..0..0..0..0..0....0..0..0..0..1....0..0..0..0..0....1..0..0..0..0 %e A218820 ..0..0..1..0..0....1..1..0..0..0....1..1..1..1..1....0..1..1..0..0 %K A218820 nonn %O A218820 1,1 %A A218820 _R. H. Hardin_ Nov 06 2012