A235231 - OEIS

A235231

Number of (n+1) X (n+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).

%I #7 Jun 19 2022 00:04:26

%S 120,1288,9656,77368,496520,3512000,21123784,140450408,822331208,

%T 5291121256

%N Number of (n+1) X (n+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 Diagonal of A235239.

%e Some solutions for n=4:

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

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_, Jan 05 2014