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A264627 Number of (n+1)X(7+1) arrays of permutations of 0..n*8+7 with each element having directed index change -2,0 -1,0 0,-1 or 1,1.

%I A264627 #4 Nov 19 2015 06:55:54
%S A264627 0,76,1200,13556,349391,7907841,145801320,2739867178,54011094032,
%T A264627 1041910674136,19735900374844,375966942137013,7191151172715700,
%U A264627 137027122103977880,2605652234584032150,49595770201824007656
%N A264627 Number of (n+1)X(7+1) arrays of permutations of 0..n*8+7 with each element having directed index change -2,0 -1,0 0,-1 or 1,1.
%C A264627 Column 7 of A264628.
%H A264627 R. H. Hardin, <a href="/A264627/b264627.txt">Table of n, a(n) for n = 1..27</a>
%e A264627 Some solutions for n=4
%e A264627 .16.17..3.11.12..6..7.15....1.17..3.11.12..6..7.15....1..2..3..4..5..6..7.23
%e A264627 ..9..0..1..2.28..4..5.23...24..0.26..2.13..4..5.31....9..0.26.27.13.14.15.31
%e A264627 .32..8.34.10.21.22.13.14...32..8..9.10.28.29.23.14...32..8.34.10.11.12.38.39
%e A264627 .25.26.27.18.19.20.31.39...25.16.27.18.19.20.21.22...25.16.17.18.19.20.21.22
%e A264627 .33.24.35.36.37.38.29.30...33.34.35.36.37.38.39.30...33.24.35.36.37.28.29.30
%Y A264627 Cf. A264628.
%K A264627 nonn
%O A264627 1,2
%A A264627 _R. H. Hardin_, Nov 19 2015