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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”).

A147005 as a simple table

na(n)
11
21
31
41
53
61
75
81
98
101
1160
127
13328
1421
152111
1677
1721687
18479
19274683
203600
214419391

[1,1,1,1,3,1,5,1,8,1,60,7,328,21,2111,77,21687,
 479,274683,3600,4419391]