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 3 (constant-stress 1 X 1 tilings).
A234221
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 3 (constant-stress 1 X 1 tilings).
Terms
- a(0) =436a(1) =1560a(2) =5612a(3) =20724a(4) =76972a(5) =293316a(6) =1123724a(7) =4410276a(8) =17381356a(9) =70026180a(10) =282816332a(11) =1165000164a(12) =4801317292a(13) =20141219076a(14) =84366071564a(15) =359107872036
External references
- oeis: A234221