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A264681 Number of (6+1)X(n+1) arrays of permutations of 0..n*7+6 with each element having directed index change -1,-1 1,0 -1,-2 -2,-2 or 0,1.

%I A264681 #4 Nov 20 2015 19:56:44
%S A264681 0,108,2417,43131,1449467,43095017,1095840260,28215481268,
%T A264681 738782370243,19083862672909,487695637623505,12462928299470408,
%U A264681 318459601523206145,8122732708229887832,206973840286092630463,5272926892002041935804
%N A264681 Number of (6+1)X(n+1) arrays of permutations of 0..n*7+6 with each element having directed index change -1,-1 1,0 -1,-2 -2,-2 or 0,1.
%C A264681 Row 6 of A264676.
%H A264681 R. H. Hardin, <a href="/A264681/b264681.txt">Table of n, a(n) for n = 1..63</a>
%e A264681 Some solutions for n=4
%e A264681 ..6..0..1..9..3....6.13..1..2..3....6..8..1..9..3....6..7..8..9..3
%e A264681 .11.18..2..7..4....0.18.19..7..4....0..5..2.14..4....0..1..2.14..4
%e A264681 ..5.10.19..8.13....5.10.11..8..9...22.17..7.12.13....5.10.24.12.13
%e A264681 .22.15.12.17.14...22.15.12.17.14...10.11.23.24.18...22.11.23.17.18
%e A264681 .26.16.28.29.23...27.16.28.29.23...15.16.34.29.19...15.16.34.29.19
%e A264681 .20.21.34.27.24...20.21.26.34.24...20.21.26.27.28...20.21.26.27.28
%e A264681 .25.30.31.32.33...25.30.31.32.33...25.30.31.32.33...25.30.31.32.33
%Y A264681 Cf. A264676.
%K A264681 nonn
%O A264681 1,2
%A A264681 _R. H. Hardin_, Nov 20 2015