A234897 - OEIS

%I #5 Jun 19 2022 23:36:32

%S 1676576,19965444,208211944,3064189932,41268054688,700047980248,

%T 10593797616896,196773939067288,3144319026581672,62377683142994196

%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 1, with no adjacent elements equal (constant-stress tilted 1 X 1 tilings).

%e Some solutions for n=1:

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

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

%Y Column 7 of A234898.

%K nonn

%O 1,1

%A _R. H. Hardin_, Jan 01 2014