Number of nX4 0..2 arrays avoiding the pattern z z+1 z horizontally and z z-1 z vertically.
A207985
Number of nX4 0..2 arrays avoiding the pattern z z+1 z horizontally and z z-1 z vertically.
Terms
- a(0) =69a(1) =4761a(2) =244325a(3) =12271227a(4) =622569385a(5) =31638012071
External references
- oeis: A207985