A074931 - OEIS

A074931 as a simple table

n	a(n)
1	3
2	5
3	17
4	29
5	41
6	71
7	149
8	281
9	317
10	347
11	359
12	397
13	647
14	751
15	787
16	857
17	907
18	1093
19	1279
20	1381
21	1511
22	1531
23	1663
24	1783
25	2447
26	2683
27	2803
28	3271
29	3323
30	4019
31	4153
32	4513
33	4567
34	4639
35	5557
36	5647
37	5801
38	5923
39	6599
40	6659
41	6911
42	7013
43	7573
44	7883
45	9187
46	9257
47	9431

[3,5,17,29,41,71,149,281,317,347,359,397,647,751, 787,857,907,1093,1279,1381,1511,1531,1663,1783, 2447,2683,2803,3271,3323,4019,4153,4513,4567,4639, 5557,5647,5801,5923,6599,6659,6911,7013,7573,7883, 9187,9257,9431]