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”).

A257745 as a simple table

na(n)
15
27
341
443
589
6127
7179
8193
9233
10263
11283
12317
13379
14383
15397
16443
17457
18487
19503
20547
21599
22607
23631
24643
25647
26719
27733
28787
29809
30821
31839
32937
33947
34971
35977
36997
371019
381039
391049
401069
411091
421097
431103
441109
451187
461193
471217
481231

[5,7,41,43,89,127,179,193,233,263,283,317,379,383,
 397,443,457,487,503,547,599,607,631,643,647,719,
 733,787,809,821,839,937,947,971,977,997,1019,1039,
 1049,1069,1091,1097,1103,1109,1187,1193,1217,1231]