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 A189149 #6 Jul 22 2025 11:34:24 %S A189149 1,81,42689,20037184,5025299720 %N A189149 Number of nX6 array permutations with each element making zero or one knight moves. %C A189149 Column 6 of A189150 %e A189149 Some solutions for 3X6 %e A189149 ..0.12.10..3..4.16...13.12..6.16.17..9....8..9..6..3..4.16....0..1.15.11.17..5 %e A189149 ..2..7..8.17.14.15...14..7..0..1.10.15...14..7.12.13..2.15...14..7..8.13.10..3 %e A189149 ..1.13..6.11..5..9....8..2..3.11..5..4....1..0.10.11..5.17...12..9..6..2.16..4 %K A189149 nonn %O A189149 1,2 %A A189149 _R. H. Hardin_ Apr 17 2011