Number of n X n 0..1 arrays with every element unequal to 2 or 3 horizontally or vertically adjacent elements, with upper left element zero.
A303630
Number of n X n 0..1 arrays with every element unequal to 2 or 3 horizontally or vertically adjacent elements, with upper left element zero.
Terms
- a(0) =0a(1) =1a(2) =0a(3) =4a(4) =20a(5) =394a(6) =7538a(7) =501126a(8) =43679228a(9) =8515657512
External references
- oeis: A303630