A257528 - OEIS

A257528 as a simple table

n	a(n)
1	23
2	31
3	47
4	59
5	71
6	73
7	79
8	131
9	139
10	167
11	173
12	181
13	229
14	239
15	251
16	269
17	277
18	331
19	353
20	359
21	367
22	421
23	439
24	449
25	467
26	479
27	499
28	587
29	617
30	661
31	701
32	709
33	739
34	751
35	761
36	797
37	887
38	941
39	967
40	1021
41	1063
42	1129
43	1151
44	1171
45	1181
46	1229
47	1279
48	1291
49	1303
50	1321
51	1427
52	1429
53	1451
54	1481

[23,31,47,59,71,73,79,131,139,167,173,181,229,239, 251,269,277,331,353,359,367,421,439,449,467,479, 499,587,617,661,701,709,739,751,761,797,887,941, 967,1021,1063,1129,1151,1171,1181,1229,1279,1291, 1303,1321,1427,1429,1451,1481]