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”).

A091531 as a simple table

na(n)
17
223
331
443
559
667
771
873
9101
10103
11107
12127
13131
14137
15139
16179
17199
18211
19223
20227
21239
22269
23281
24283
25307
26311
27331
28347
29359
30367
31379
32383
33431
34439
35463
36467
37479
38487
39491
40503
41523
42547
43563
44571
45607
46619
47631
48643
49659
50661
51683
52691
53719
54727

[7,23,31,43,59,67,71,73,101,103,107,127,131,137,
 139,179,199,211,223,227,239,269,281,283,307,311,
 331,347,359,367,379,383,431,439,463,467,479,487,
 491,503,523,547,563,571,607,619,631,643,659,661,
 683,691,719,727]