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A027390 as a simple table

na(n)
01
13
212
356
4294
51698
610624
771256
8508188
93829652
1030340464
11251647872
122177440648
1319596586584
14182967013056
151768251873632
1617653554391056
17181748836240944
181926542292294592
1920996051677557888
20234959167687868256
212696726674789023008

[1,3,12,56,294,1698,10624,71256,508188,3829652,
 30340464,251647872,2177440648,19596586584,
 182967013056,1768251873632,17653554391056,
 181748836240944,1926542292294592,
 20996051677557888,234959167687868256,
 2696726674789023008]