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A228770 as a simple table

na(n)
11
21
33
412
551
6217
7912
83785
915554
1063458
11257566
121041548
134200462
1416906262
1567943341
16272740788
171093881967
184384217569
1917562176283
2070319782015
21281466691159
221126304935761
234505961410365
2418023526090613
2572082118816829
26288245594631227
271152536796877409
284607992736095739
2918422141293792669
3073645313049839723

[1,1,3,12,51,217,912,3785,15554,63458,257566,
 1041548,4200462,16906262,67943341,272740788,
 1093881967,4384217569,17562176283,70319782015,
 281466691159,1126304935761,4505961410365,
 18023526090613,72082118816829,288245594631227,
 1152536796877409,4607992736095739,
 18422141293792669,73645313049839723]