A139943 - OEIS

A139943 as a simple table

n	a(n)
1	3
2	131
3	167
4	227
5	311
6	419
7	479
8	503
9	719
10	839
11	887
12	983
13	1091
14	1151
15	1319
16	1559
17	1571
18	1847
19	1907
20	1931
21	1979
22	2063
23	2267
24	2351
25	2411
26	2579
27	2663
28	2819
29	2999
30	3023
31	3083
32	3167
33	3191
34	3359
35	3407
36	3491
37	3779
38	3947
39	4007
40	4091
41	4451
42	4583

[3,131,167,227,311,419,479,503,719,839,887,983, 1091,1151,1319,1559,1571,1847,1907,1931,1979,2063, 2267,2351,2411,2579,2663,2819,2999,3023,3083,3167, 3191,3359,3407,3491,3779,3947,4007,4091,4451,4583]