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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”).

A147205 as a simple table

na(n)
11
21
31
41
51
61
71
81
95
1013
1125
1241
13107
14335
15953
163255
1714559
1866659
19322289
201582731
218865325
2255810029

[1,1,1,1,1,1,1,1,5,13,25,41,107,335,953,3255,
 14559,66659,322289,1582731,8865325,55810029]