Number of n X n 0..1 arrays avoiding 0 0 0 and 0 1 1 horizontally and 0 0 1 and 1 0 1 vertically.
A207019
Number of n X n 0..1 arrays avoiding 0 0 0 and 0 1 1 horizontally and 0 0 1 and 1 0 1 vertically.
Terms
- a(0) =2a(1) =16a(2) =90a(3) =558a(4) =3315a(5) =16038a(6) =95900a(7) =492932a(8) =2542374a(9) =14009768a(10) =70576726a(11) =371721351a(12) =1947251540a(13) =9924535935a(14) =51877222492a(15) =266862076008
External references
- oeis: A207019