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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.

A137752 First numerator and then denominator (left to right) of Leibniz's harmonic-like triangle.

Table of values

n a(n)
1 1
2 1
3 1
4 2
5 1
6 2
7 1
8 3
9 5
10 6
11 1
12 3
13 1
14 4
15 7
16 12
17 7
18 12
19 1
20 4
21 1
22 5
23 9
24 20
25 31
26 30
27 9
28 20
29 1
30 5
31 1
32 6
33 11
34 30
35 49
36 60
37 49
38 60
39 11
40 30
41 1
42 6
43 1
44 7
45 13
46 42
47 71
48 105
49 209
50 140
51 71
52 105
53 13
54 42
55 1
56 7
57 1
58 8
59 15
60 56
61 97
62 168
63 351
64 280
65 351
66 280
67 97
68 168

List of values

[1, 1, 1, 2, 1, 2, 1, 3, 5, 6, 1, 3, 1, 4, 7, 12, 7, 12, 1, 4, 1, 5, 9, 20, 31, 30, 9, 20, 1, 5, 1, 6, 11, 30, 49, 60, 49, 60, 11, 30, 1, 6, 1, 7, 13, 42, 71, 105, 209, 140, 71, 105, 13, 42, 1, 7, 1, 8, 15, 56, 97, 168, 351, 280, 351, 280, 97, 168]

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

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