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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”).

A057178 as a simple table

na(n)
15
211
3109
4193
51483
611353
721419
821911
924071
10106859
11139739
12495953

[5,11,109,193,1483,11353,21419,21911,24071,106859,
 139739,495953]