Number of n X n 0..1 arrays with every element equal to 0, 1 or 3 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
A302157
Number of n X n 0..1 arrays with every element equal to 0, 1 or 3 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
Terms
- a(0) =1a(1) =3a(2) =7a(3) =29a(4) =140a(5) =635a(6) =2853a(7) =19993a(8) =75825a(9) =786161a(10) =2915241a(11) =49663915a(12) =152854596a(13) =4893607560a(14) =13149908952a(15) =764803558904
External references
- oeis: A302157