A264421 - OEIS

A264421

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

%I #3 Nov 12 2015 23:00:42

%S 0,385,15088,1103666,95946259,7577203142,577598946184,44052069039720

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

%C Column 6 of A264422.

%e Some solutions for n=3

%e .15..9..7..2.12..4..5....8..9.10.11.12..4..5....8..9..1.18.12..4..5

%e ..0..1.17..3.19.20..6....0.16.24..3.19.20..6....0.16..2..3.19.20..6

%e .22..8.24.25.11.27.13....7.23.21..1..2.27.13....7.23.21.25.11.27.13

%e .14.21.16.23.18.10.26...14.15.22.17.18.25.26...14.15.22.17.24.10.26

%Y Cf. A264422.

%K nonn

%O 1,2

%A _R. H. Hardin_, Nov 12 2015