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%I #3 Nov 16 2015 17:17:44
%S 1,46,2116,65182,2007889,50099452,1250046736,33040712340,873318285225,
%T 23316358581360,622513677650176,16358436196050416,429867558557693881
%N Number of (7+1)X(n+1) arrays of permutations of 0..n*8+7 with each element having directed index change -1,0 0,2 -1,-2 or 1,0.
%C Row 7 of A264520.
%e Some solutions for n=4
%e ..7..6..0..8..2....5..6..7..8..2....7..6..9..1..2....7..6..9..1..2
%e .10..1.14..3..4....0..1.12..3..4....0.11.12..3..4....0.13..5..3..4
%e ..5.18.19.11..9...17.16.19.11..9....5.18.10..8.19...17.18.19..8.12
%e .22.21.12.13.17...10.23.22.13.14...22.23.15.13.14...10.11.22.16.14
%e .15.16.27.28.29...15.28.27.18.29...25.16.17.28.29...15.26.27.21.29
%e .20.33.25.23.24...20.21.25.26.24...20.21.34.26.24...20.33.25.23.24
%e .35.26.37.38.39...37.36.39.38.32...35.36.27.38.39...35.38.37.28.39
%e .30.31.32.36.34...30.31.35.33.34...30.31.32.33.37...30.31.32.36.34
%Y Cf. A264520.
%K nonn
%O 1,2
%A _R. H. Hardin_, Nov 16 2015