Number of n X 4 0..1 arrays with the number of 1's horizontally or vertically adjacent to some 0 one less than the number of 0's adjacent to some 1.
A284767
Number of n X 4 0..1 arrays with the number of 1's horizontally or vertically adjacent to some 0 one less than the number of 0's adjacent to some 1.
Terms
- a(0) =2a(1) =52a(2) =720a(3) =10120a(4) =145822a(5) =2134812a(6) =31677488a(7) =474539092a(8) =7162528912a(9) =108751977400
External references
- oeis: A284767