Number of n X n 0..1 arrays avoiding 0 0 0 and 0 1 0 horizontally and 0 0 1 and 0 1 0 vertically.
A207420
Number of n X n 0..1 arrays avoiding 0 0 0 and 0 1 0 horizontally and 0 0 1 and 0 1 0 vertically.
Terms
- a(0) =2a(1) =16a(2) =114a(3) =1521a(4) =55361a(5) =3892729a(6) =474552171a(7) =116947584576
External references
- oeis: A207420