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.

A307779 a(1) = 1; a(n+1) = Sum_{d|n, n/d odd} a(d).

Table of values

n a(n)
1 1
2 1
3 1
4 2
5 2
6 3
7 4
8 5
9 5
10 7
11 8
12 9
13 11
14 12
15 13
16 17
17 17
18 18
19 22
20 23
21 25
22 31
23 32
24 33
25 38
26 41
27 42
28 49
29 51
30 52
31 63
32 64
33 64
34 74
35 75
36 82
37 93
38 94
39 95
40 108
41 113
42 114
43 130
44 131
45 133
46 155
47 156
48 157
49 174
50 179
51 187
52 206
53 208
54 209
55 231
56 242
57 247
58 271
59 272
60 273
61 307
62 308
63 309
64 345
65 345

List of values

[1, 1, 1, 2, 2, 3, 4, 5, 5, 7, 8, 9, 11, 12, 13, 17, 17, 18, 22, 23, 25, 31, 32, 33, 38, 41, 42, 49, 51, 52, 63, 64, 64, 74, 75, 82, 93, 94, 95, 108, 113, 114, 130, 131, 133, 155, 156, 157, 174, 179, 187, 206, 208, 209, 231, 242, 247, 271, 272, 273, 307, 308, 309, 345, 345]

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

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