A033221 - OEIS

A033221 as a simple table

n	a(n)
1	31
2	47
3	67
4	131
5	149
6	173
7	227
8	283
9	293
10	349
11	379
12	431
13	521
14	577
15	607
16	617
17	653
18	811
19	839
20	853
21	857
22	919
23	937
24	971
25	1031
26	1063
27	1117
28	1187
29	1213
30	1237
31	1259
32	1303
33	1327
34	1451
35	1493
36	1523
37	1559
38	1583
39	1619
40	1663
41	1721
42	1723
43	1741
44	1879
45	1931
46	1973
47	1993
48	2003
49	2017
50	2153
51	2273
52	2333
53	2341
54	2521
55	2531
56	2539
57	2543
58	2609
59	2707
60	2711
61	2713
62	2767
63	2797

[31,47,67,131,149,173,227,283,293,349,379,431,521, 577,607,617,653,811,839,853,857,919,937,971,1031, 1063,1117,1187,1213,1237,1259,1303,1327,1451,1493, 1523,1559,1583,1619,1663,1721,1723,1741,1879,1931, 1973,1993,2003,2017,2153,2273,2333,2341,2521,2531, 2539,2543,2609,2707,2711,2713,2767,2797]