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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.

A337559 Number of length three 1..n vectors that contain their harmonic mean.

Table of values

n a(n)
1 1
2 2
3 3
4 4
5 5
6 18
7 19
8 20
9 21
10 22
11 23
12 36
13 37
14 38
15 51
16 52
17 53
18 66
19 67
20 80
21 81
22 82
23 83
24 96
25 97
26 98
27 99
28 112
29 113
30 138
31 139
32 140
33 141
34 142
35 155
36 168
37 169
38 170
39 171
40 184
41 185
42 210
43 211
44 212
45 237
46 238
47 239
48 252
49 253
50 254
51 255
52 256
53 257
54 270
55 271
56 284
57 285
58 286
59 287
60 324
61 325
62 326
63 339

List of values

[1, 2, 3, 4, 5, 18, 19, 20, 21, 22, 23, 36, 37, 38, 51, 52, 53, 66, 67, 80, 81, 82, 83, 96, 97, 98, 99, 112, 113, 138, 139, 140, 141, 142, 155, 168, 169, 170, 171, 184, 185, 210, 211, 212, 237, 238, 239, 252, 253, 254, 255, 256, 257, 270, 271, 284, 285, 286, 287, 324, 325, 326, 339]

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

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