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A189608 Number of nX7 array permutations with each element not moving, or moving one space E, S or NW.

%I A189608 #7 Jul 22 2025 11:50:22
%S A189608 1,129,3248,108785,3414588,107793872,3394457868,106717857552,
%T A189608 3352763054744,105288130659056,3305643786649888,103772022994114688,
%U A189608 3257440136563770512,102248757981895108688,3209460671164514648880
%N A189608 Number of nX7 array permutations with each element not moving, or moving one space E, S or NW.
%C A189608 Column 7 of A189610
%H A189608 R. H. Hardin, <a href="/A189608/b189608.txt">Table of n, a(n) for n = 1..200</a>
%e A189608 Some solutions for 3X7
%e A189608 ..0..1..2..3..4..5..6....0..1.10..2.12..4..6....0..1..2.11..4.13..6
%e A189608 .15..8..9.18.11.20.12....7.16..8..3.11..5.13....7..8.17..3.10..5.12
%e A189608 ..7.14.16.10.17.19.13...14.15..9.17.18.19.20...14.15..9.16.18.19.20
%K A189608 nonn
%O A189608 1,2
%A A189608 _R. H. Hardin_ Apr 24 2011