A235238 - OEIS

%I #7 Jun 19 2022 00:00:44

%S 170864,348876,698304,1593940,3548456,8787924,21123784,55565636,

%T 141304528,389137436,1033108024,2948180108,8099212024,23769869420,

%U 67153607264,201544634004,582902960392,1781509519796,5256618469672

%N Number of (n+1) X (7+1) 0..6 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 6, with no adjacent elements equal (constant-stress tilted 1 X 1 tilings).

%C Column 7 of A235239.

%H R. H. Hardin, <a href="/A235238/b235238.txt">Table of n, a(n) for n = 1..28</a>

%e Some solutions for n=1:

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_, Jan 05 2014