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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.

A189246 Number of n X n array permutations with each element making zero or one king moves.

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%I A189246 #14 Sep 03 2024 15:08:50
%S A189246 1,24,2961,7396009,194762146816,71437033921822425,
%T A189246 330453235652954061843137,20019535342827950668977079681024,
%U A189246 15708505438679657289806294970498013833233,160414174990431372841568811126249791614409201147297
%N A189246 Number of n X n array permutations with each element making zero or one king moves.
%e A189246 Some solutions for 3 X 3:
%e A189246 ..4..2..5....3..1..4....4..0..1....0..3..4....0..2..1....0..2..4....0..1..2
%e A189246 ..0..1..7....0..2..7....3..7..2....1..8..2....4..8..7....6..7..1....6..8..5
%e A189246 ..6..3..8....6..5..8....6..8..5....6..7..5....3..6..5....3..5..8....3..4..7
%Y A189246 Diagonal of A189254.
%K A189246 nonn
%O A189246 1,2
%A A189246 _R. H. Hardin_, Apr 19 2011
%E A189246 a(9)-a(10) from _Pontus von Brömssen_, Sep 03 2024

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