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A139006 as a simple table

na(n)
01
12
23
39
428
5137
6811
76884
875303
91133287
1022573092
11608722751
1221933950111
131064082678978
1469200610896639
156047740350081131
16709281636920027844
17111719166691840119209
1823622672695690329752039

[1,2,3,9,28,137,811,6884,75303,1133287,22573092,
 608722751,21933950111,1064082678978,
 69200610896639,6047740350081131,
 709281636920027844,111719166691840119209,
 23622672695690329752039]