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This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A221981 Primes q = 4*p+1, where p == 2 (mod 5) is also prime.

Table of values

n a(n)
1 29
2 149
3 269
4 389
5 509
6 1109
7 1229
8 1949
9 2309
10 2909
11 3989
12 4349
13 5189
14 5309
15 6269
16 6389
17 7109
18 7949
19 8069
20 9749
21 10589
22 10709
23 11069
24 11549
25 12149
26 12269
27 13229
28 13829
29 14549
30 15629
31 16229
32 17189
33 17789
34 18269
35 19949
36 20789
37 22109
38 22229
39 24029
40 24989
41 25349
42 25469
43 25589
44 26189
45 26309
46 28109
47 28229
48 28949
49 29669
50 30029
51 30869
52 31469
53 32069
54 33149
55 34589
56 34949
57 36269
58 36629
59 36749
60 37589

List of values

[29, 149, 269, 389, 509, 1109, 1229, 1949, 2309, 2909, 3989, 4349, 5189, 5309, 6269, 6389, 7109, 7949, 8069, 9749, 10589, 10709, 11069, 11549, 12149, 12269, 13229, 13829, 14549, 15629, 16229, 17189, 17789, 18269, 19949, 20789, 22109, 22229, 24029, 24989, 25349, 25469, 25589, 26189, 26309, 28109, 28229, 28949, 29669, 30029, 30869, 31469, 32069, 33149, 34589, 34949, 36269, 36629, 36749, 37589]