Number of n X n 0..1 arrays with every element equal to 2, 3, 4, 5 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
A301394
Number of n X n 0..1 arrays with every element equal to 2, 3, 4, 5 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
Terms
- a(0) =0a(1) =1a(2) =3a(3) =78a(4) =4857a(5) =885003a(6) =528025038a(7) =956047339302
External references
- oeis: A301394