Number of 4Xn 0..1 arrays avoiding 0 0 0 and 0 1 1 horizontally and 0 0 1 and 1 1 0 vertically.
A207113
Number of 4Xn 0..1 arrays avoiding 0 0 0 and 0 1 1 horizontally and 0 0 1 and 1 1 0 vertically.
Terms
- a(0) =8a(1) =64a(2) =200a(3) =643a(4) =1835a(5) =4534a(6) =11511a(7) =27012a(8) =62814a(9) =144676a(10) =325111a(11) =733469a(12) =1635998a(13) =3639007a(14) =8091148a(15) =17910532a(16) =39681294a(17) =87775953a(18) =194044225a(19) =429056388a(20) =947971827a(21) =2094875648a(22) =4628499152a(23) =10225059546a(24) =22590584639a(25) =49903794405
External references
- oeis: A207113