login

A227576 as a simple table

na(n)
15
27
311
413
517
631
737
841
967
10107
11151
12257
13349
14457
15787
16911
171289
181627
193271
208233
2113163
2214551
2331517
2455579
25103289

[5,7,11,13,17,31,37,41,67,107,151,257,349,457,787,
 911,1289,1627,3271,8233,13163,14551,31517,55579,
 103289]