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”).

A103389 as a simple table

na(n)
12
23
35
47
517
631
771
8127
9157
10227
11257
12293
13349
14419
15503
168179
1765657
1868053
1972421
2080429
21258949
22493109
2316399511
2433609887
2534225183
261387603957
275575987679
2815932884421
2935689079297
30693128029907
31957136790429
321129233918343
3310363690074667
3441632551979939
3510815125582078291

[2,3,5,7,17,31,71,127,157,227,257,293,349,419,503,
 8179,65657,68053,72421,80429,258949,493109,
 16399511,33609887,34225183,1387603957,5575987679,
 15932884421,35689079297,693128029907,957136790429,
 1129233918343,10363690074667,41632551979939,
 10815125582078291]