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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”).

A146798 as a simple table

na(n)
11
21
31
41
51
69
749
8253
91201
104573
1130217
12286533
132941009
1437746461
15678979449
1614880214645
17369497873441

[1,1,1,1,1,9,49,253,1201,4573,30217,286533,
 2941009,37746461,678979449,14880214645,
 369497873441]