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”).

A137258 as a simple table

na(n)
13
25
37
417
519
6139
7157
8577
91201
1027361
11530401
122513281
137183201
14407817217

[3,5,7,17,19,139,157,577,1201,27361,530401,
 2513281,7183201,407817217]