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A240881 as a simple table

na(n)
01
12
29
358
4401
52952
622759
7181358
81481751
912346102
10104505959
11896170608
127768885801
1367972510202
14599449125609
155323095489058
1647555513297801
17427127946025752
183854618439044959
1934934658168463958
20317834095671077751
212901725605879035502
2226575914921615695759

[1,2,9,58,401,2952,22759,181358,1481751,12346102,
 104505959,896170608,7768885801,67972510202,
 599449125609,5323095489058,47555513297801,
 427127946025752,3854618439044959,
 34934658168463958,317834095671077751,
 2901725605879035502,26575914921615695759]