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%I #4 Nov 14 2015 15:41:28
%S 2,64,384,10116,174927,3842048,74367790,1462247321,29509300516,
%T 577847245296,11385134340072,225727859320572,4442739834521648,
%U 87589711996716421,1729226298092553854,34086490092213796815
%N Number of (7+1)X(n+1) arrays of permutations of 0..n*8+7 with each element having directed index change 0,1 1,0 2,1 or -1,-1.
%C Row 7 of A264476.
%H R. H. Hardin, <a href="/A264481/b264481.txt">Table of n, a(n) for n = 1..210</a>
%e Some solutions for n=4
%e ..6..0..1..2..3....6..7..8..2..3....6..0..1..9..3....6..7..1..9..3
%e .11.12.13..7..4....0..1.13.14..4...11.12..2..7..4....0.12..2.14..4
%e ..5.10.18..8..9...16.10.11.19..9....5.10.18..8.13....5.17.11..8.13
%e .21.15.23.24.14...21..5.12.24.18...21.22.23.24.14...10.22.16.24.18
%e .26.16.17.29.19...15.20.17.22.23...15.16.17.29.19...15.27.21.29.19
%e .20.25.22.34.28...31.32.26.27.28...31.32.26.27.28...20.25.26.34.28
%e .36.37.31.39.33...25.37.38.39.29...25.20.38.39.33...36.37.31.39.23
%e .30.35.32.27.38...30.35.36.33.34...30.35.36.37.34...30.35.32.33.38
%Y Cf. A264476.
%K nonn
%O 1,1
%A _R. H. Hardin_, Nov 14 2015
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