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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”).

A147450 as a simple table

na(n)
11
21
31
41
51
61
71
81
91
1013
1127
1249
13163
14479
151319
164265
1714651
1850725
19219167
201062605
215322067
2229208507

[1,1,1,1,1,1,1,1,1,13,27,49,163,479,1319,4265,
 14651,50725,219167,1062605,5322067,29208507]