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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”).

A067607 as a simple table

na(n)
11
21
31
43
520
62
735
8455
95804
1073232
116
12167
132001
1424974
15339220
164646117
1765758725

[1,1,1,3,20,2,35,455,5804,73232,6,167,2001,24974,
 339220,4646117,65758725]