A083520 - OEIS

A083520 as a simple table

n	a(n)
1	3
2	7
3	13
4	31
5	43
6	61
7	73
8	157
9	211
10	241
11	307
12	337
13	421
14	463
15	601
16	757
17	991
18	1123
19	1321
20	1483
21	1723
22	2521
23	2551
24	2731
25	2971
26	3307
27	3361
28	3541
29	3907
30	4423
31	4831
32	5113
33	5701
34	6007
35	6163
36	6481
37	6841
38	8011
39	8191
40	9241
41	9901
42	10303
43	10627
44	11131
45	12211
46	12433

[3,7,13,31,43,61,73,157,211,241,307,337,421,463, 601,757,991,1123,1321,1483,1723,2521,2551,2731, 2971,3307,3361,3541,3907,4423,4831,5113,5701,6007, 6163,6481,6841,8011,8191,9241,9901,10303,10627, 11131,12211,12433]