A072581 - OEIS

A072581 as a simple table

n	a(n)
1	19
2	53
3	139
4	193
5	311
6	313
7	409
8	577
9	641
10	719
11	787
12	809
13	1033
14	1061
15	1097
16	1171
17	1193
18	1289
19	1627
20	1637
21	1657
22	1669
23	1693
24	1699
25	1747
26	1811
27	1877
28	1889
29	2083
30	2089
31	2153
32	2161
33	2179
34	2203
35	2213
36	2273
37	2311
38	2659
39	2689
40	2753
41	3169
42	3677
43	3727
44	3733

[19,53,139,193,311,313,409,577,641,719,787,809, 1033,1061,1097,1171,1193,1289,1627,1637,1657,1669, 1693,1699,1747,1811,1877,1889,2083,2089,2153,2161, 2179,2203,2213,2273,2311,2659,2689,2753,3169,3677, 3727,3733]