Number of n X n 0..1 arrays with every element equal to 0, 1, 3 or 4 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
A300499
Number of n X n 0..1 arrays with every element equal to 0, 1, 3 or 4 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
Terms
- a(0) =1a(1) =3a(2) =4a(3) =20a(4) =56a(5) =1162a(6) =17412a(7) =1045409a(8) =76908966a(9) =12262865881
External references
- oeis: A300499