login

A264619 as a simple table

na(n)
01
17
221
331
473
593
6107
7127
8273
9313
10341
11381
12403
13443
14471
15511
161057
171137
181193
191273
201317
211397
221453
231533
241571
251651
261707
271787
281831
291911
301967
312047
324161
334321
344433
354593
364681
374841
384953
395113
405189
415349
425461
435621
445709
455869
465981
476141
486211
496371
506483
516643
526731
536891
547003
557163
567239

[1,7,21,31,73,93,107,127,273,313,341,381,403,443,
 471,511,1057,1137,1193,1273,1317,1397,1453,1533,
 1571,1651,1707,1787,1831,1911,1967,2047,4161,4321,
 4433,4593,4681,4841,4953,5113,5189,5349,5461,5621,
 5709,5869,5981,6141,6211,6371,6483,6643,6731,6891,
 7003,7163,7239]