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.

A347098 a(1) = 1; a(n) = -Sum_{d|n, d < n} A336853(n/d) * a(d), where A336853(n) = A003961(n) - n.

Table of values

n a(n)
1 1
2 -1
3 -2
4 -4
5 -2
6 -5
7 -4
8 -10
9 -12
10 -7
11 -2
12 -1
13 -4
14 -11
15 -12
16 -16
17 -2
18 -1
19 -4
20 -7
21 -18
22 -13
23 -6
24 42
25 -20
26 -17
27 -42
28 -5
29 -2
30 21
31 -6
32 -4
33 -24
34 -19
35 -26
36 106
37 -4
38 -23
39 -30
40 38
41 -2
42 45
43 -4
44 -25
45 -10
46 -29
47 -6
48 196
49 -56
50 -17
51 -36
52 -23
53 -6
54 123
55 -28
56 82
57 -42
58 -31
59 -2
60 225
61 -6
62 -37
63 4
64 80
65 -38
66 15
67 -4
68 -43
69 -52
70 39
71 -2
72 413

List of values

[1, -1, -2, -4, -2, -5, -4, -10, -12, -7, -2, -1, -4, -11, -12, -16, -2, -1, -4, -7, -18, -13, -6, 42, -20, -17, -42, -5, -2, 21, -6, -4, -24, -19, -26, 106, -4, -23, -30, 38, -2, 45, -4, -25, -10, -29, -6, 196, -56, -17, -36, -23, -6, 123, -28, 82, -42, -31, -2, 225, -6, -37, 4, 80, -38, 15, -4, -43, -52, 39, -2, 413]

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

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