Number of n X 3 0..3 arrays avoiding the pattern z z+1 z horizontally and z z-1 z vertically.
A209087
Number of n X 3 0..3 arrays avoiding the pattern z z+1 z horizontally and z z-1 z vertically.
Terms
- a(0) =61a(1) =3721a(2) =196916a(3) =10347649a(4) =544875737a(5) =28698007940
External references
- oeis: A209087