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A234908 Number of (n+1) X (4+1) 0..7 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 1, with no adjacent elements equal (constant-stress tilted 1 X 1 tilings). 1

%I #6 Jun 20 2022 15:36:53

%S 65048,692608,7067096,87088300,1035687060,13775604012,175004599884,

%T 2424540636888,31723187334888,449888252601960,5970366769567980,

%U 86025115239391572,1150587072601597108,16789707566545824404

%N Number of (n+1) X (4+1) 0..7 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 1, with no adjacent elements equal (constant-stress tilted 1 X 1 tilings).

%H R. H. Hardin, <a href="/A234908/b234908.txt">Table of n, a(n) for n = 1..103</a>

%e Some solutions for n=1:

%e 1 5 7 2 6 4 2 6 4 6 3 5 2 4 6 5 2 0 2 5

%e 0 3 4 0 3 3 0 5 2 3 4 7 3 6 7 7 5 4 5 7

%Y Column 4 of A234911.

%K nonn

%O 1,1

%A _R. H. Hardin_, Jan 01 2014

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Last modified April 24 22:17 EDT 2024. Contains 371964 sequences. (Running on oeis4.)