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A208480 as a simple table

na(n)
11
23
310
455
5196
62730
710032
8108999
9973258
1020780331
1179309308
122614200602
1310073335754
14288845706742
1511805287917646
16254331289285523

[1,3,10,55,196,2730,10032,108999,973258,20780331,
 79309308,2614200602,10073335754,288845706742,
 11805287917646,254331289285523]