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A235074 Number of (n+1) X (3+1) 0..7 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 3, with no adjacent elements equal (constant-stress tilted 1 X 1 tilings). 1

%I

%S 11976,86704,676192,5686836,48272960,417137872,3604917936,31461207572,

%T 274289989296,2412618175328,21191825497096,187812605182108,

%U 1661568339714520,14834880496119016,132156788082113096

%N Number of (n+1) X (3+1) 0..7 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 3, with no adjacent elements equal (constant-stress tilted 1 X 1 tilings).

%H R. H. Hardin, <a href="/A235074/b235074.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=2:

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

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

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

%Y Column 3 of A235078.

%K nonn

%O 1,1

%A _R. H. Hardin_, Jan 03 2014

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Last modified August 17 08:02 EDT 2022. Contains 356184 sequences. (Running on oeis4.)