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A177396 as a simple table

na(n)
11
22
315
4166
52253
634860
7592549
810828938
9209868510
104273308410
1190816552106
122004641983826
1345791082809343
141079342545547998
1526193557661047655
16653283080573467694
1716720129397788274155
18438610481782905122800

[1,2,15,166,2253,34860,592549,10828938,209868510,
 4273308410,90816552106,2004641983826,
 45791082809343,1079342545547998,26193557661047655,
 653283080573467694,16720129397788274155,
 438610481782905122800]