A146972 - OEIS

A146972 as a simple table

n	a(n)
1	3
2	5
3	7
4	41
5	43
6	137
7	139
8	191
9	193
10	197
11	199
12	227
13	229
14	281
15	283
16	311
17	313
18	461
19	463
20	599
21	601
22	641
23	643
24	821
25	823
26	827
27	829
28	881
29	883
30	1031
31	1033
32	1091
33	1093
34	1277
35	1279
36	1301
37	1303
38	1451
39	1453
40	1721
41	1723
42	1871
43	1873
44	2027
45	2029
46	2081
47	2083
48	2087
49	2089

[3,5,7,41,43,137,139,191,193,197,199,227,229,281, 283,311,313,461,463,599,601,641,643,821,823,827, 829,881,883,1031,1033,1091,1093,1277,1279,1301, 1303,1451,1453,1721,1723,1871,1873,2027,2029,2081, 2083,2087,2089]