Number of 4 X n 0..1 arrays with the number of 1's horizontally, diagonally or antidiagonally adjacent to some 0 equal to the number of 0's adjacent to some 1, with top left element zero.
A284337
Number of 4 X n 0..1 arrays with the number of 1's horizontally, diagonally or antidiagonally adjacent to some 0 equal to the number of 0's adjacent to some 1, with top left element zero.
Terms
- a(0) =8a(1) =42a(2) =415a(3) =5130a(4) =68458a(5) =966889a(6) =13941789a(7) =204883324a(8) =3047634270a(9) =45762072338a(10) =692220227870
External references
- oeis: A284337