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A219154 as a simple table

na(n)
121
2115
31234
413725
5153666
61707676
719027977
8212185508
92364398926
1026340590202
11293506138765
123270741315594
1336446345471550
14406115718692959
154525329122813891
1650425948246871931
17561897448263085844

[21,115,1234,13725,153666,1707676,19027977,
 212185508,2364398926,26340590202,293506138765,
 3270741315594,36446345471550,406115718692959,
 4525329122813891,50425948246871931,
 561897448263085844]