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A264489 Number of (n+1)X(6+1) arrays of permutations of 0..n*7+6 with each element having directed index change 2,-1 1,0 2,1 0,-1 -2,-2 or -1,0.

%I A264489 #5 Nov 14 2015 16:51:44
%S A264489 1,42,972,23076,2186741,42169152,2775259622,98973991195,4820591214512
%N A264489 Number of (n+1)X(6+1) arrays of permutations of 0..n*7+6 with each element having directed index change 2,-1 1,0 2,1 0,-1 -2,-2 or -1,0.
%C A264489 Column 6 of A264490.
%e A264489 Some solutions for n=4
%e A264489 ..7..8..9.10.11..6.13....7..8..9.10.20.12.13....7..8..3.10.11..6.13
%e A264489 ..0..1..2..3..4.19.20....0.15.25..3..4.19..6...14.15.16.17.18..5.20
%e A264489 .21.22.23.24.34.26..5...30.22..1..2.11.26..5...21..0..1..2.34..4.27
%e A264489 .28.15.30.17.32.33.12...28.29.16.31.32.33.34...28..9.30.31.32.33.12
%e A264489 .29.14.31.16.25.18.27...21.14.23.24.17.18.27...29.22.23.24.25.26.19
%Y A264489 Cf. A264490.
%K A264489 nonn
%O A264489 1,2
%A A264489 _R. H. Hardin_, Nov 14 2015