Number of n X n 0..2 arrays with the sum of the absolute differences of each element with its horizontal and vertical neighbors equal to the number of neighbors.
A265886
Number of n X n 0..2 arrays with the sum of the absolute differences of each element with its horizontal and vertical neighbors equal to the number of neighbors.
Terms
- a(0) =3a(1) =12a(2) =68a(3) =664a(4) =13672a(5) =560512a(6) =51483264a(7) =8726974464
External references
- oeis: A265886