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Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

A138017 as a simple table

na(n)
11
23
35
415
537
6111
7317
8951
92821
108463
1125325
1275975
13227797
14683391
152049917
166149751
1718448741
1855346223

[1,3,5,15,37,111,317,951,2821,8463,25325,75975,
 227797,683391,2049917,6149751,18448741,55346223]