Number of n X n 0..1 arrays with every element equal to 0, 1, 2 or 3 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
A302259
Number of n X n 0..1 arrays with every element equal to 0, 1, 2 or 3 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
Terms
- a(0) =1a(1) =8a(2) =153a(3) =5922a(4) =429854a(5) =64975832a(6) =18964765818
External references
- oeis: A302259