Number of n X n 0..1 arrays with every element unequal to 1, 2, 3, 5 or 6 king-move adjacent elements, with upper left element zero.
A304691
Number of n X n 0..1 arrays with every element unequal to 1, 2, 3, 5 or 6 king-move adjacent elements, with upper left element zero.
Terms
- a(0) =0a(1) =7a(2) =56a(3) =918a(4) =37050a(5) =2753404a(6) =389403912a(7) =111681916203
External references
- oeis: A304691