Number of nX3 0..3 arrays with values 0..3 introduced in row major order and each element equal to no more than two horizontal and vertical neighbors.
A200796
Number of nX3 0..3 arrays with values 0..3 introduced in row major order and each element equal to no more than two horizontal and vertical neighbors.
Terms
- a(0) =5a(1) =178a(2) =9880a(3) =583813a(4) =34679839a(5) =2060918000a(6) =122478253815
External references
- oeis: A200796