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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”).

A057191 as a simple table

na(n)
13
27
323
429
559
61249
71709
81823
91931
103433
118863
1243201
1378707

[3,7,23,29,59,1249,1709,1823,1931,3433,8863,43201,
 78707]