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A037672 as a simple table

na(n)
13
229
3261
42352
521170
6190530
71714773
815432959
9138896631
101250069682
1111250627140
12101255644260
13911300798343
148201707185089
1573815364665801
16664338281992212
175979044537929910

[3,29,261,2352,21170,190530,1714773,15432959,
 138896631,1250069682,11250627140,101255644260,
 911300798343,8201707185089,73815364665801,
 664338281992212,5979044537929910]