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 A264385 Number of (7+1)X(n+1) arrays of permutations of 0..n*8+7 with each element having directed index change 2,-2 -1,0 -1,2 1,0 or 0,-1. 1

%I

%S 1,1343,156293,11888603,1363452981,149731056598,16353452350876,

%T 1735328063172744,188810032043800381,20288902506786356394,

%U 2189915587683013427440,235922552838031495595870

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

%C Row 7 of A264379.

%H R. H. Hardin, <a href="/A264385/b264385.txt">Table of n, a(n) for n = 1..33</a>

%e Some solutions for n=3

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

%e ..0..1..2..9....0..9..2..3....0..1..8..3....0..9.10..3....0..9..8..3

%e .12.10..6.15....4.10.14.13....9..5.12.13....4..5.12.13...12.10..6..7

%e ..8.14.16.11....8.17.16.11...16.14.10.17....8.17.15.11...13.14.18.11

%e .20.13.19.23...12.21.20.15...20.11.22.23...20.18.14.21...17.21.20.15

%e .21.17.18.25...24.22.23.25...21.15.18.19...16.25.23.19...16.22.26.25

%e .28.29.22.31...18.19.28.31...28.29.30.31...28.26.22.29...28.19.30.29

%e .24.30.26.27...29.30.26.27...24.25.26.27...24.30.31.27...24.23.31.27

%Y Cf. A264379.

%K nonn

%O 1,2

%A _R. H. Hardin_, Nov 12 2015

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Last modified March 21 06:15 EDT 2023. Contains 361392 sequences. (Running on oeis4.)