Number of (n+1) X (n+1) 0..4 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 4 (constant-stress 1 X 1 tilings).
A234556
Number of (n+1) X (n+1) 0..4 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 4 (constant-stress 1 X 1 tilings).
Terms
- a(0) =70a(1) =546a(2) =2390a(3) =11982a(4) =42982a(5) =187686a(6) =635654a(7) =2614518a(8) =8740870a(9) =34959606a(10) =117588230a(11) =464375382a(12) =1585487302
External references
- oeis: A234556