Number of n X n 0..1 arrays with every element equal to 0, 1, 2 or 3 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
A300466
Number of n X n 0..1 arrays with every element equal to 0, 1, 2 or 3 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
Terms
- a(0) =1a(1) =8a(2) =160a(3) =8608a(4) =1231578a(5) =462538206a(6) =456303004550
External references
- oeis: A300466