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A234172 Number of (n+1) X (3+1) 0..6 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 1 (constant-stress 1 X 1 tilings). 1

%I #6 Jun 19 2022 01:51:46

%S 47936,1173940,31382488,877700068,25133134704,729604466884,

%T 21336968498856,627009808429332,18469535419340472,545113896765577704,

%U 16099953582167606184,475972286878459170524,14072893642290774269272

%N Number of (n+1) X (3+1) 0..6 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 1 (constant-stress 1 X 1 tilings).

%H R. H. Hardin, <a href="/A234172/b234172.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=1:

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

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

%Y Column 3 of A234175.

%K nonn

%O 1,1

%A _R. H. Hardin_, Dec 20 2013

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Last modified September 16 22:04 EDT 2024. Contains 375979 sequences. (Running on oeis4.)