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A264087 Number of (n+1)X(5+1) arrays of permutations of 0..n*6+5 with each element having index change +-(.,.) 0,0 0,1 or 2,-2. 1

%I #6 Nov 10 2015 11:20:43

%S 169,8788,456976,19553300,836655625,35960283125,1545608400625,

%T 66425039324500,2854724293344400,122686726306616820,

%U 5272674789270374721,226602328913809523253,9738627455964881203129,418534378290010327242292

%N Number of (n+1)X(5+1) arrays of permutations of 0..n*6+5 with each element having index change +-(.,.) 0,0 0,1 or 2,-2.

%C Column 5 of A264090.

%H R. H. Hardin, <a href="/A264087/b264087.txt">Table of n, a(n) for n = 1..210</a>

%F Empirical: a(n) = 43*a(n-1) -a(n-2) +1848*a(n-4) -79464*a(n-5) +1848*a(n-6) -1848*a(n-8) +79464*a(n-9) -1848*a(n-10) +a(n-12) -43*a(n-13) +a(n-14)

%e Some solutions for n=2

%e ..1..0.12..3..5..4....0..1.12.13.14..4....1..0.12..2..4..5....0..1..2..3..5.15

%e ..6..8..7.10..9.11....6..7..9..8.10.11....6..8..7.10..9.11....6..7..9..8.10.11

%e ..2.13.14.16.15.17....2..3.15..5.16.17...13..3.14.16.15.17...12.13..4.14.16.17

%Y Cf. A264090.

%K nonn

%O 1,1

%A _R. H. Hardin_, Nov 03 2015

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Last modified April 19 16:21 EDT 2024. Contains 371794 sequences. (Running on oeis4.)