Number of n X n 0..1 arrays avoiding 0 0 0 and 1 1 1 horizontally and 0 0 1 and 0 1 0 vertically.
A207768
Number of n X n 0..1 arrays avoiding 0 0 0 and 1 1 1 horizontally and 0 0 1 and 0 1 0 vertically.
Terms
- a(0) =2a(1) =16a(2) =84a(3) =828a(4) =11950a(5) =195160a(6) =6513576a(7) =364308938a(8) =15284596082
External references
- oeis: A207768