Number of n X n 0..1 arrays with every element equal to 1, 2 or 4 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
A302272
Number of n X n 0..1 arrays with every element equal to 1, 2 or 4 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
Terms
- a(0) =0a(1) =3a(2) =22a(3) =89a(4) =1219a(5) =15862a(6) =384916a(7) =11370253a(8) =325745362a(9) =20953111994
External references
- oeis: A302272