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”).

A291281 as a simple table

na(n)
12
23
317
419
523
631
747
853
961
10107
11109
12113
13137
14139
15151
16173
17197
18199
19211
20227
21229
22233
23241
24257
25263
26293
27317
28347
29353
30383
31421
32439
33443
34467
35499
36541
37587
38593
39619
40647
41661
42677
43683
44691
45751
46769
47773
48857
49919

[2,3,17,19,23,31,47,53,61,107,109,113,137,139,151,
 173,197,199,211,227,229,233,241,257,263,293,317,
 347,353,383,421,439,443,467,499,541,587,593,619,
 647,661,677,683,691,751,769,773,857,919]