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A189609 Number of n X 8 array permutations with each element not moving, or moving one space E, S or NW.

%I A189609 #7 Sep 04 2022 10:44:04
%S A189609 1,277,11568,671452,36212912,1968061359,106717857552,5778059258273,
%T A189609 312573095738121,16898643737922425,913264073225048477,
%U A189609 49345410349072594251,2665888554266786412238,144014204839657901069783
%N A189609 Number of n X 8 array permutations with each element not moving, or moving one space E, S or NW.
%C A189609 Column 8 of A189610.
%H A189609 R. H. Hardin, <a href="/A189609/b189609.txt">Table of n, a(n) for n = 1..200</a>
%e A189609 Some solutions for 3 X 8
%e A189609 ..9..0..2.12..4..5..6..7....9..0..2.12.13.14..5..7....0..1.11.12..3..5.15..6
%e A189609 .17..1.19..3.11.22.13.15...17..1.10..3..4.22..6.15....8..9..2.10..4.13.14..7
%e A189609 ..8.16.10.18.20.21.14.23....8.16.18.11.19.20.21.23...16.17.18.19.20.21.22.23
%Y A189609 Cf. A189610.
%K A189609 nonn
%O A189609 1,2
%A A189609 _R. H. Hardin_, Apr 24 2011