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A234670 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 4 (constant-stress 1 X 1 tilings). 1

%I #8 Jun 20 2022 19:45:56

%S 229272,1648188,11826092,85076140,612823800,4421960468,31951474920,

%T 231249678820,1675919782860,12165195549188,88420148767440,

%U 643663869538676,4691581089095824,34248260363836644,250321059877067092

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

%H R. H. Hardin, <a href="/A234670/b234670.txt">Table of n, a(n) for n = 1..36</a>

%e Some solutions for n=1:

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

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

%Y Column 4 of A234672.

%K nonn

%O 1,1

%A _R. H. Hardin_, Dec 29 2013

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Last modified August 7 02:33 EDT 2024. Contains 375003 sequences. (Running on oeis4.)