Number of (n+1) X (n+1) 0..2 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 2 (constant-stress 1 X 1 tilings).
A234258
Number of (n+1) X (n+1) 0..2 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 2 (constant-stress 1 X 1 tilings).
Terms
- a(0) =20a(1) =88a(2) =292a(3) =988a(4) =3188a(5) =11140a(6) =39508a(7) =147892a(8) =562580a(9) =2191828a(10) =8605972a(11) =34091668a(12) =135464468a(13) =539959060a(14) =2154718228a(15) =8607898132
External references
- oeis: A234258