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A234244 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 2 (constant-stress 1 X 1 tilings). 1

%I #6 Jun 20 2022 19:08:53

%S 790718,23428586,725628904,22918035530,726655747532,23141164047392,

%T 736603691141316,23507963375000526,749462059155365450,

%U 23951460063621821168,764584860814829968090,24467051427944239943588

%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 2 (constant-stress 1 X 1 tilings).

%H R. H. Hardin, <a href="/A234244/b234244.txt">Table of n, a(n) for n = 1..32</a>

%e Some solutions for n=1:

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

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

%Y Column 4 of A234245.

%K nonn

%O 1,1

%A _R. H. Hardin_, Dec 21 2013

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Last modified April 25 07:41 EDT 2024. Contains 371964 sequences. (Running on oeis4.)