Number of nX4 0..1 arrays avoiding 0 0 0 and 1 0 1 horizontally and 0 1 1 and 1 0 1 vertically.
A207758
Number of nX4 0..1 arrays avoiding 0 0 0 and 1 0 1 horizontally and 0 1 1 and 1 0 1 vertically.
Terms
- a(0) =9a(1) =81a(2) =221a(3) =663a(4) =2245a(5) =6459a(6) =17563a(7) =48649a(8) =131269a(9) =344873a(10) =902075a(11) =2342619a(12) =6021103a(13) =15395621a(14) =39219821a(15) =99470227a(16) =251449497a(17) =634148313a(18) =1595707571a(19) =4007571389a(20) =10049914241a(21) =25169768531a(22) =62965428327a(23) =157368593823a(24) =392995561393
External references
- oeis: A207758