Number of n X n 0..1 arrays avoiding 0 0 1 and 0 1 1 horizontally and 0 0 1 and 1 0 1 vertically.
A208137
Number of n X n 0..1 arrays avoiding 0 0 1 and 0 1 1 horizontally and 0 0 1 and 1 0 1 vertically.
Terms
- a(0) =2a(1) =16a(2) =108a(3) =900a(4) =6300a(5) =50176a(6) =352800a(7) =2722500a(8) =19111950a(9) =144288144a(10) =1010017008a(11) =7505103424a(12) =52382558592a(13) =384598425600
External references
- oeis: A208137