Number of n X n 0..1 arrays with every element equal to 0, 1 or 3 horizontally or vertically adjacent elements, with upper left element zero.
A301535
Number of n X n 0..1 arrays with every element equal to 0, 1 or 3 horizontally or vertically adjacent elements, with upper left element zero.
Terms
- a(0) =1a(1) =3a(2) =9a(3) =79a(4) =658a(5) =10783a(6) =255406a(7) =9891331a(8) =588765472a(9) =55421789236
External references
- oeis: A301535