A137270 - OEIS

A137270 as a simple table

n	a(n)
1	3
2	5
3	7
4	13
5	17
6	23
7	47
8	53
9	67
10	73
11	83
12	97
13	107
14	113
15	167
16	193
17	197
18	263
19	293
20	317
21	367
22	373
23	383
24	457
25	463
26	467
27	487
28	503
29	557
30	593
31	607
32	643
33	647
34	673
35	677
36	683
37	773
38	787
39	797
40	823
41	827
42	857
43	877
44	887
45	947
46	1033
47	1063
48	1087
49	1103
50	1187
51	1193
52	1223
53	1303

[3,5,7,13,17,23,47,53,67,73,83,97,107,113,167,193, 197,263,293,317,367,373,383,457,463,467,487,503, 557,593,607,643,647,673,677,683,773,787,797,823, 827,857,877,887,947,1033,1063,1087,1103,1187,1193, 1223,1303]