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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.

A117992 Number of distinct rational numbers less than 1 that can be written as fractions of the first n composite numbers.

Table of values

n a(n)
1 0
2 1
3 3
4 5
5 9
6 11
7 17
8 20
9 26
10 29
11 33
12 38
13 50
14 54
15 65
16 80
17 89
18 98
19 102
20 113
21 123
22 144
23 158
24 166
25 190
26 203
27 215
28 222
29 236
30 247
31 277
32 287
33 314
34 328
35 346
36 364
37 375
38 400
39 417
40 438
41 478
42 487
43 529
44 548
45 573
46 604
47 617
48 641
49 667
50 683
51 698
52 749
53 769
54 796
55 836
56 851
57 873

List of values

[0, 1, 3, 5, 9, 11, 17, 20, 26, 29, 33, 38, 50, 54, 65, 80, 89, 98, 102, 113, 123, 144, 158, 166, 190, 203, 215, 222, 236, 247, 277, 287, 314, 328, 346, 364, 375, 400, 417, 438, 478, 487, 529, 548, 573, 604, 617, 641, 667, 683, 698, 749, 769, 796, 836, 851, 873]

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

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