Number of n X n 0..1 arrays with every element equal to 0, 1, 4, 5 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
A303308
Number of n X n 0..1 arrays with every element equal to 0, 1, 4, 5 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
Terms
- a(0) =1a(1) =3a(2) =12a(3) =36a(4) =139a(5) =1221a(6) =26184a(7) =746323a(8) =23967605a(9) =1285074158a(10) =140135122490
External references
- oeis: A303308