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.

A331309 a(n) = A000005(A225546(n)), where A000005 gives the number of divisors of n.

Table of values

n a(n)
1 1
2 2
3 3
4 2
5 5
6 4
7 9
8 4
9 3
10 6
11 17
12 6
13 33
14 10
15 7
16 2
17 65
18 6
19 129
20 10
21 11
22 18
23 257
24 8
25 5
26 34
27 9
28 18
29 513
30 8
31 1025
32 4
33 19
34 66
35 13
36 4
37 2049
38 130
39 35
40 12
41 4097
42 12
43 8193
44 34
45 15
46 258
47 16385
48 6
49 9
50 10
51 67
52 66
53 32769
54 12
55 21
56 20
57 131
58 514
59 65537
60 14
61 131073
62 1026
63 27
64 4
65 37
66 20
67 262145
68 130
69 259
70 14
71 524289
72 8
73 1048577
74 2050
75 15

List of values

[1, 2, 3, 2, 5, 4, 9, 4, 3, 6, 17, 6, 33, 10, 7, 2, 65, 6, 129, 10, 11, 18, 257, 8, 5, 34, 9, 18, 513, 8, 1025, 4, 19, 66, 13, 4, 2049, 130, 35, 12, 4097, 12, 8193, 34, 15, 258, 16385, 6, 9, 10, 67, 66, 32769, 12, 21, 20, 131, 514, 65537, 14, 131073, 1026, 27, 4, 37, 20, 262145, 130, 259, 14, 524289, 8, 1048577, 2050, 15]