Number of n X n 0..1 arrays with every element equal to 1, 2, 3 or 4 king-move adjacent elements, with upper left element zero.
A297916
Number of n X n 0..1 arrays with every element equal to 1, 2, 3 or 4 king-move adjacent elements, with upper left element zero.
Terms
- a(0) =0a(1) =4a(2) =109a(3) =4771a(4) =575754a(5) =173216147a(6) =127727388127
External references
- oeis: A297916