Number of 4Xn 0..1 arrays avoiding 0 0 0 and 0 1 0 horizontally and 0 0 1 and 0 1 0 vertically.
A207428
Number of 4Xn 0..1 arrays avoiding 0 0 0 and 0 1 0 horizontally and 0 0 1 and 0 1 0 vertically.
Terms
- a(0) =9a(1) =81a(2) =351a(3) =1521a(4) =8463a(5) =47089a(6) =241087a(7) =1234321a(8) =6520459a(9) =34445161a(10) =179832029a(11) =938870881a(12) =4924284469a(13) =25827382681a(14) =135217499129a(15) =707921987161
External references
- oeis: A207428