Number of (n+2)X(2+2) 0..1 arrays with no 3x3 subblock diagonal sum 0 or 1 and no antidiagonal sum 0 or 1 and no row sum 0 and no column sum 0.
A254972
Number of (n+2)X(2+2) 0..1 arrays with no 3x3 subblock diagonal sum 0 or 1 and no antidiagonal sum 0 or 1 and no row sum 0 and no column sum 0.
Terms
- a(0) =310a(1) =1282a(2) =6915a(3) =27211a(4) =116534a(5) =518534a(6) =2243657a(7) =9685030a(8) =42217091a(9) =183348161a(10) =795467850a(11) =3455917275a(12) =15010520704a(13) =65178568847a(14) =283071522309
External references
- oeis: A254972