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”).

A120726 as a simple table

na(n)
12
23
37
45
59
641
77
811
943
1011
1115
1247
13155
1413
1517
1649
17157
1817
1921
2053
21161
22417
2319
2423
2555
26163
27419
2823
2927
3059
31167
32423
3329
3433
3565
36173
37429

[2,3,7,5,9,41,7,11,43,11,15,47,155,13,17,49,157,
 17,21,53,161,417,19,23,55,163,419,23,27,59,167,
 423,29,33,65,173,429]