Number of n X n 0..1 arrays with every element equal to 1, 2, 3 or 6 king-move adjacent elements, with upper left element zero.
A297987
Number of n X n 0..1 arrays with every element equal to 1, 2, 3 or 6 king-move adjacent elements, with upper left element zero.
Terms
- a(0) =0a(1) =4a(2) =48a(3) =466a(4) =5100a(5) =74675a(6) =1276012a(7) =30240388a(8) =1056360518a(9) =50037661325
External references
- oeis: A297987