A139845 - OEIS

A139845 as a simple table

n	a(n)
1	3
2	47
3	83
4	167
5	227
6	383
7	467
8	503
9	563
10	587
11	647
12	887
13	983
14	1223
15	1307
16	1427
17	1487
18	1823
19	1847
20	1907
21	2063
22	2243
23	2267
24	2663
25	2687
26	2903
27	3023
28	3083
29	3167
30	3323
31	3407
32	3527
33	3863
34	3923
35	3947
36	4007
37	4283
38	4583
39	4703
40	4787
41	5003
42	5087
43	5507

[3,47,83,167,227,383,467,503,563,587,647,887,983, 1223,1307,1427,1487,1823,1847,1907,2063,2243,2267, 2663,2687,2903,3023,3083,3167,3323,3407,3527,3863, 3923,3947,4007,4283,4583,4703,4787,5003,5087,5507]