Number of nX3 0..4 arrays with values 0..4 introduced in row major order and each element equal to one or two horizontal and vertical neighbors.
A198664
Number of nX3 0..4 arrays with values 0..4 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) =2715a(4) =59281a(5) =1544783a(6) =40546053a(7) =1100262051a(8) =29830418147a(9) =813591963761
External references
- oeis: A198664