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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”).

A147459 as a simple table

na(n)
11
21
31
41
51
69
717
831
997
10415
111502
127931
1340536
14274361
151932218
1618327587
17174386942

[1,1,1,1,1,9,17,31,97,415,1502,7931,40536,274361,
 1932218,18327587,174386942]