login

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”).

A339344 as a simple table

na(n)
13
25
317
4257
565537
64294967311
71229782942255939601
888962710886098567818446141338419231
9255302062200114858892457591448999891874349780170241684791167583265041

[3,5,17,257,65537,4294967311,1229782942255939601,
 88962710886098567818446141338419231,
 25530206220011485889245759144899989187434978017024\
 1684791167583265041]