Number of (n+1) X (2+1) 0..4 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 2, with no adjacent elements equal (constant-stress tilted 1 X 1 tilings).
A234915
Number of (n+1) X (2+1) 0..4 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 2, with no adjacent elements equal (constant-stress tilted 1 X 1 tilings).
Terms
- a(0) =120a(1) =360a(2) =1128a(3) =3912a(4) =13368a(5) =47980a(6) =169128a(7) =615344a(8) =2208840a(9) =8101636a(10) =29440480a(11) =108555776a(12) =397778288a(13) =1471836460a(14) =5423279536a(15) =20112150000a(16) =74378680256a(17) =276229599252
External references
- oeis: A234915