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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”).

A273775 as a simple table

na(n)
4257
523
613
7229
811
913
1013
11599
1229
13109
14541
1529
1683
174099
182011
1923
2047
212042851
22115981

[257,23,13,229,11,13,13,599,29,109,541,29,83,4099,
 2011,23,47,2042851,115981]