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.

A238746 Number of distinct prime signatures that occur among the divisors of the n-th prime signature number (A025487(n)).

Table of values

n a(n)
1 1
2 2
3 3
4 3
5 4
6 5
7 5
8 7
9 4
10 6
11 6
12 9
13 7
14 7
15 9
16 11
17 10
18 8
19 12
20 9
21 13
22 5
23 10
24 13
25 9
26 15
27 14
28 15
29 9
30 14
31 16
32 10
33 18
34 19
35 17
36 13
37 18
38 10
39 19
40 11
41 16
42 21
43 12
44 15
45 24
46 19
47 17
48 22
49 16
50 22
51 12
52 23
53 24
54 6
55 19
56 20
57 29
58 21
59 21
60 26
61 22
62 25
63 13
64 30
65 27
66 11
67 26
68 25
69 19
70 34

List of values

[1, 2, 3, 3, 4, 5, 5, 7, 4, 6, 6, 9, 7, 7, 9, 11, 10, 8, 12, 9, 13, 5, 10, 13, 9, 15, 14, 15, 9, 14, 16, 10, 18, 19, 17, 13, 18, 10, 19, 11, 16, 21, 12, 15, 24, 19, 17, 22, 16, 22, 12, 23, 24, 6, 19, 20, 29, 21, 21, 26, 22, 25, 13, 30, 27, 11, 26, 25, 19, 34]

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

Content is available under The OEIS End-User License Agreement.