A249380 - OEIS

A249380 as a simple table

n	a(n)
1	3
2	7
3	19
4	61
5	67
6	109
7	139
8	277
9	337
10	349
11	523
12	547
13	727
14	751
15	823
16	853
17	859
18	883
19	991
20	1009
21	1063
22	1093
23	1231
24	1237
25	1279
26	1291
27	1321
28	1423
29	1429
30	1447
31	1531
32	1609
33	1657
34	1723
35	1759
36	1867
37	1933
38	1951
39	2089
40	2113
41	2131
42	2683

[3,7,19,61,67,109,139,277,337,349,523,547,727,751, 823,853,859,883,991,1009,1063,1093,1231,1237,1279, 1291,1321,1423,1429,1447,1531,1609,1657,1723,1759, 1867,1933,1951,2089,2113,2131,2683]