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 A186967 #8 Jul 22 2025 10:38:08 %S A186967 0,24,1344,10440,43424,130592,320880,686384,1326848,2374152,3996832 %N A186967 Number of 4-turn queen's tours on an n X n board summed over all starting positions. %C A186967 Row 4 of A186965 %e A186967 Some solutions for 3X3 %e A186967 ..0..0..4....4..0..0....0..0..0....0..4..0....3..2..1....0..2..0....0..3..0 %e A186967 ..0..0..2....0..3..1....0..2..1....2..1..3....0..0..0....4..0..3....1..4..2 %e A186967 ..0..1..3....0..0..2....4..3..0....0..0..0....4..0..0....0..1..0....0..0..0 %K A186967 nonn %O A186967 1,2 %A A186967 _R. H. Hardin_ Mar 01 2011