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A234918 Number of (n+1) X (5+1) 0..4 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 2, with no adjacent elements equal (constant-stress tilted 1 X 1 tilings). 1

%I #6 Jun 20 2022 15:38:01

%S 3848,13368,49056,221272,991144,4834440,22970144,115287720,562322520,

%T 2874164624,14288844920,74156061840,375019322800,1972786791616,

%U 10136809663120,53964866220544,281379640263800,1513505664100088

%N Number of (n+1) X (5+1) 0..4 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 2, with no adjacent elements equal (constant-stress tilted 1 X 1 tilings).

%H R. H. Hardin, <a href="/A234918/b234918.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=3:

%e 0 1 4 1 0 1 1 4 3 4 3 0 4 1 0 3 4 3 4 3 0 1 2 3

%e 3 2 3 2 3 2 2 3 0 3 4 3 1 0 1 2 1 2 3 4 3 2 1 4

%e 0 1 0 1 0 1 1 4 3 4 3 4 4 1 4 3 4 3 2 1 2 3 0 1

%e 1 4 1 0 1 4 2 3 0 3 0 3 1 0 1 2 1 2 3 0 3 2 1 0

%Y Column 5 of A234921.

%K nonn

%O 1,1

%A _R. H. Hardin_, Jan 01 2014

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Last modified April 27 20:19 EDT 2024. Contains 372020 sequences. (Running on oeis4.)