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.

A027761 Numerator of sum_{p prime, p-1 divides 2*n} 1/p.

Table of values

n a(n)
1 5
2 31
3 41
4 31
5 61
6 3421
7 5
8 557
9 821
10 371
11 121
12 3421
13 5
14 929
15 15745
16 557
17 5
18 2557843
19 5
20 15541
21 1805
22 743
23 241
24 60887
25 61
26 1673
27 821
28 929
29 301
30 79085411
31 5
32 557
33 66961
34 31
35 4397
36 188641729
37 5
38 31
39 3281
40 277727
41 421
42 4462547
43 5
44 66817
45 313477
46 1487
47 5
48 5952449

List of values

[5, 31, 41, 31, 61, 3421, 5, 557, 821, 371, 121, 3421, 5, 929, 15745, 557, 5, 2557843, 5, 15541, 1805, 743, 241, 60887, 61, 1673, 821, 929, 301, 79085411, 5, 557, 66961, 31, 4397, 188641729, 5, 31, 3281, 277727, 421, 4462547, 5, 66817, 313477, 1487, 5, 5952449]