A007658 - OEIS

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A007658 as a simple table

n	a(n)
1	3
2	5
3	7
4	13
5	23
6	43
7	281
8	359
9	487
10	577
11	1579
12	1663
13	1741
14	3191
15	9209
16	11257
17	12743
18	13093
19	17027
20	26633
21	104243
22	134227
23	152287
24	700897
25	1205459
26	1896463
27	2533963
28	2674381
29	7034611

[3,5,7,13,23,43,281,359,487,577,1579,1663,1741, 3191,9209,11257,12743,13093,17027,26633,104243, 134227,152287,700897,1205459,1896463,2533963, 2674381,7034611]