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A264634 Number of (7+1)X(n+1) arrays of permutations of 0..n*8+7 with each element having directed index change -2,0 -1,0 0,-1 or 1,1. 1

%I

%S 6,64,832,19521,389512,7201068,145801320,2894056084,55482368576,

%T 1083985544985,21146352754070,408087901833692,7923037689375810,

%U 153609972224719312,2971979031834135932,57595394302971820088

%N Number of (7+1)X(n+1) arrays of permutations of 0..n*8+7 with each element having directed index change -2,0 -1,0 0,-1 or 1,1.

%C Row 7 of A264628.

%H R. H. Hardin, <a href="/A264634/b264634.txt">Table of n, a(n) for n = 1..170</a>

%e Some solutions for n=4

%e ..1..2..7..4..9....1..2..7..4..9....1..2..3..4..9....5..6..3..4..9

%e ..6..0.12.13..3....6..0..8.18..3...10..0.12.13.14...10..0..1..2.14

%e .11..5.17.14..8...15..5.17.14.19...11..5..6..7..8...15.12.13..7..8

%e .20.10.18.19.29...16.10.11.12.13...20.17.22.19.29...20.21.11.19.24

%e .21.15.16.24.34...30.22.23.24.34...25.15.16.24.18...25.22.16.17.18

%e .26.31.32.22.23...35.20.21.29.39...30.27.21.38.23...35.27.37.29.23

%e .35.25.37.27.28...31.25.26.27.28...35.32.26.34.28...31.32.26.34.28

%e .36.30.38.39.33...36.37.38.32.33...36.37.31.39.33...36.30.38.39.33

%Y Cf. A264628.

%K nonn

%O 1,1

%A _R. H. Hardin_, Nov 19 2015

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Last modified February 20 22:47 EST 2020. Contains 332086 sequences. (Running on oeis4.)