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.

A119272 Product of numerator and denominator in Stern-Brocot tree.

Table of values

n a(n)
1 0
2 0
3 1
4 2
5 2
6 3
7 6
8 6
9 3
10 4
11 10
12 15
13 12
14 12
15 15
16 10
17 4
18 5
19 14
20 24
21 21
22 28
23 40
24 35
25 20
26 20
27 35
28 40
29 28
30 21
31 24
32 14
33 5
34 6
35 18
36 33
37 30
38 44
39 65
40 60
41 36
42 45
43 84
44 104
45 77
46 70
47 88
48 63
49 30
50 30
51 63
52 88
53 70
54 77
55 104
56 84
57 45
58 36
59 60
60 65
61 44
62 30
63 33
64 18
65 6
66 7
67 22
68 42
69 39
70 60
71 90
72 85
73 52
74 70

List of values

[0, 0, 1, 2, 2, 3, 6, 6, 3, 4, 10, 15, 12, 12, 15, 10, 4, 5, 14, 24, 21, 28, 40, 35, 20, 20, 35, 40, 28, 21, 24, 14, 5, 6, 18, 33, 30, 44, 65, 60, 36, 45, 84, 104, 77, 70, 88, 63, 30, 30, 63, 88, 70, 77, 104, 84, 45, 36, 60, 65, 44, 30, 33, 18, 6, 7, 22, 42, 39, 60, 90, 85, 52, 70]

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

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