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A264524 Number of (6+1)X(n+1) arrays of permutations of 0..n*7+6 with each element having directed index change -1,0 0,2 -1,-2 or 1,0.

%I A264524 #4 Nov 16 2015 17:17:24
%S A264524 0,0,576,10368,186624,2856816,43731769,696507612,11093144976,
%T A264524 178795599948,2881767670929,45735094197492,725838818428816,
%U A264524 11506986415823456,182424435028933696,2894261482434465920
%N A264524 Number of (6+1)X(n+1) arrays of permutations of 0..n*7+6 with each element having directed index change -1,0 0,2 -1,-2 or 1,0.
%C A264524 Row 6 of A264520.
%H A264524 R. H. Hardin, <a href="/A264524/b264524.txt">Table of n, a(n) for n = 1..26</a>
%e A264524 Some solutions for n=4
%e A264524 ..7..6..0..1..2....7..6..9..1..2....7..8..9..1..2....5..8..7..1..2
%e A264524 .12.13..5..3..4....0.13..5..3..4....0.11.14..3..4....0.13.14..3..4
%e A264524 .15.18.17..8..9...15.16.10..8.12....5..6.19.18.12...15..6.10.11..9
%e A264524 .10.11.24.16.14...20.11.22.23.14...10.23.22.13.17...22.23.12.16.17
%e A264524 .27.28.20.21.19...27.28.17.18.19...15.16.20.21.29...27.28.20.18.19
%e A264524 .32.33.22.23.34...32.21.34.33.24...30.31.34.33.24...32.21.34.33.24
%e A264524 .25.26.30.31.29...25.26.30.31.29...25.26.27.28.32...25.26.30.31.29
%Y A264524 Cf. A264520.
%K A264524 nonn
%O A264524 1,3
%A A264524 _R. H. Hardin_, Nov 16 2015