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.

A085073 Smallest k such that n+k and n*k have the same prime signature, or 0 if no such number exists.

Table of values

n a(n)
1 2
2 1
3 7
4 41
5 15
6 134
7 3
8 127
9 11
10 2
11 3
12 548
13 2
14 1
15 3
16 389
17 5
18 582
19 2
20 316
21 1
22 38
23 3
24 2216
25 3
26 2
27 13
28 212
29 5
30 2742
31 2
32 1669
33 1
34 1
35 31
36 2764
37 2
38 1
39 13
40 1094
41 4
42 2298
43 3
44 1
45 123
46 14
47 11
48 8912
49 3
50 202
51 17
52 2
53 2
54 1146
55 23
56 904
57 1
58 26
59 3
60 11028
61 13
62 22
63 57
64 3581
65 37
66 1194
67 2
68 172
69 15

List of values

[2, 1, 7, 41, 15, 134, 3, 127, 11, 2, 3, 548, 2, 1, 3, 389, 5, 582, 2, 316, 1, 38, 3, 2216, 3, 2, 13, 212, 5, 2742, 2, 1669, 1, 1, 31, 2764, 2, 1, 13, 1094, 4, 2298, 3, 1, 123, 14, 11, 8912, 3, 202, 17, 2, 2, 1146, 23, 904, 1, 26, 3, 11028, 13, 22, 57, 3581, 37, 1194, 2, 172, 15]