cp's OEIS Frontend

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.

A155032 Primes p such that both pi(p) and the concatenation of pi(p) and p are prime, where pi is the prime counting function.

Table of values

n a(n)
1 3
2 59
3 83
4 179
5 283
6 353
7 431
8 709
9 1433
10 2269
11 2381
12 3559
13 3593
14 4153
15 5503
16 6899
17 7109
18 7351
19 7649
20 8513
21 11909
22 13297
23 14107
24 14437
25 14591
26 16073
27 16127
28 16451
29 16901
30 17117
31 17539
32 17987
33 18149
34 19777
35 20759
36 21317
37 22027
38 24439
39 25357
40 26783
41 27437
42 29269
43 30253
44 32299
45 34057
46 34259
47 34421
48 34543
49 35617
50 36307
51 37049

List of values

[3, 59, 83, 179, 283, 353, 431, 709, 1433, 2269, 2381, 3559, 3593, 4153, 5503, 6899, 7109, 7351, 7649, 8513, 11909, 13297, 14107, 14437, 14591, 16073, 16127, 16451, 16901, 17117, 17539, 17987, 18149, 19777, 20759, 21317, 22027, 24439, 25357, 26783, 27437, 29269, 30253, 32299, 34057, 34259, 34421, 34543, 35617, 36307, 37049]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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