Number of n X n 0..1 arrays with every element equal to 0, 1, 3 or 4 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
A302303
Number of n X n 0..1 arrays with every element equal to 0, 1, 3 or 4 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
Terms
- a(0) =1a(1) =3a(2) =13a(3) =66a(4) =445a(5) =5715a(6) =76642a(7) =2150420a(8) =124691962a(9) =17216491876
External references
- oeis: A302303