cp's OEIS Frontend

A189279 Number of nX8 array permutations with each element not moved or moved diagonally or antidiagonally by one.

%I A189279 #7 Jul 22 2025 11:40:19
%S A189279 1,1156,140625,39100009,8366395024,1949419118656,441979857682489,
%T A189279 101143260268999524,23076937169939058561,5270856026569766627569,
%U A189279 1203479485449751104976144,274821392418575218931980321
%N A189279 Number of nX8 array permutations with each element not moved or moved diagonally or antidiagonally by one.
%C A189279 Column 8 of A189280
%H A189279 R. H. Hardin, <a href="/A189279/b189279.txt">Table of n, a(n) for n = 1..71</a>
%e A189279 Some solutions for 3X8
%e A189279 ..0..1..9.12..4..5.13..7....0..8..9..3..4.12.15..7....9..8..2..3.11..5..6..7
%e A189279 ..8.18.19..2..3..6.23.15....1..2.19.18..5.22.23..6....1..0.17..4.19.20.21.22
%e A189279 .16.17.11.10.20.21.22.14...16.17.11.10.20.21.13.14...16.10.18.12.13.14.15.23
%K A189279 nonn
%O A189279 1,2
%A A189279 _R. H. Hardin_ Apr 19 2011