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.

A319745 Nonunitary harmonic numbers: numbers such that the harmonic mean of their nonunitary divisors is an integer.

Table of values

n a(n)
1 4
2 9
3 12
4 18
5 24
6 25
7 45
8 49
9 54
10 60
11 112
12 121
13 126
14 150
15 168
16 169
17 270
18 289
19 294
20 336
21 361
22 529
23 560
24 594
25 637
26 726
27 841
28 961
29 1014
30 1232
31 1369
32 1638
33 1680
34 1681
35 1734
36 1849
37 1984
38 2166
39 2184
40 2209
41 2430
42 2520
43 2688
44 2700
45 2809
46 2850
47 3174
48 3481
49 3721
50 3780

List of values

[4, 9, 12, 18, 24, 25, 45, 49, 54, 60, 112, 121, 126, 150, 168, 169, 270, 289, 294, 336, 361, 529, 560, 594, 637, 726, 841, 961, 1014, 1232, 1369, 1638, 1680, 1681, 1734, 1849, 1984, 2166, 2184, 2209, 2430, 2520, 2688, 2700, 2809, 2850, 3174, 3481, 3721, 3780]

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

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