Number of n X n 0..1 arrays with every element equal to 0, 2, 4, 5 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
A303320
Number of n X n 0..1 arrays with every element equal to 0, 2, 4, 5 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
Terms
- a(0) =1a(1) =2a(2) =4a(3) =2a(4) =64a(5) =56a(6) =2956a(7) =24759a(8) =3531980a(9) =122180446a(10) =68902353881
External references
- oeis: A303320