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A163470 as a simple table

na(n)
03
115
281
3453
42571
514679
684009
7481245
82757843
915806559
1090600513
11519318837
122976744027
1317062807335
1497804786329
15560621795277
163213512139939
1718420013780911
18105584452428081
19605215440272805

[3,15,81,453,2571,14679,84009,481245,2757843,
 15806559,90600513,519318837,2976744027,
 17062807335,97804786329,560621795277,
 3213512139939,18420013780911,105584452428081,
 605215440272805]