Number of nX3 0..3 arrays with values 0..3 introduced in row major order and each element equal to one or two horizontal and vertical neighbors.
A199144
Number of nX3 0..3 arrays with values 0..3 introduced in row major order and each element equal to one or two horizontal and vertical neighbors.
Terms
- a(0) =1a(1) =13a(2) =132a(3) =2453a(4) =42420a(5) =794416a(6) =14511531a(7) =268456338a(8) =4940928443a(9) =91146218920
External references
- oeis: A199144