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A146783 as a simple table

na(n)
11
21
31
417
557
6369
75039
8105411
92937697
10116344821
117465413345
12762264403505
13114422662087491

[1,1,1,17,57,369,5039,105411,2937697,116344821,
 7465413345,762264403505,114422662087491]