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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.

A157001 Fractions x/y, with 1<=x, y<=n, that reduce to (odd)/(even).

Table of values

n a(n)
1 0
2 1
3 2
4 5
5 7
6 11
7 14
8 21
9 25
10 32
11 37
12 47
13 53
14 63
15 70
16 85
17 93
18 106
19 115
20 132
21 142
22 158
23 169
24 191
25 203
26 222
27 235
28 259
29 273
30 295
31 310
32 341
33 357
34 382
35 399
36 430
37 448
38 476
39 495
40 532
41 552
42 583
43 604
44 642
45 664
46 698
47 721
48 767
49 791
50 828
51 853
52 898
53 924
54 964
55 991
56 1043
57 1071

List of values

[0, 1, 2, 5, 7, 11, 14, 21, 25, 32, 37, 47, 53, 63, 70, 85, 93, 106, 115, 132, 142, 158, 169, 191, 203, 222, 235, 259, 273, 295, 310, 341, 357, 382, 399, 430, 448, 476, 495, 532, 552, 583, 604, 642, 664, 698, 721, 767, 791, 828, 853, 898, 924, 964, 991, 1043, 1071]

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

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