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A219215 as a simple table

na(n)
121
235
3955
410287
5131724
61401275
714175675
8136413948
91283062154
1011695541948
11102588904127
12863023412195
136981340309288
1454544421462030
15413195108006170
163042964253577367
1721823625042074665
18152628759842187080

[21,35,955,10287,131724,1401275,14175675,
 136413948,1283062154,11695541948,102588904127,
 863023412195,6981340309288,54544421462030,
 413195108006170,3042964253577367,
 21823625042074665,152628759842187080]