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.

A007340 Numbers whose divisors' harmonic and arithmetic means are both integers.

Table of values

n a(n)
1 1
2 6
3 140
4 270
5 672
6 1638
7 2970
8 6200
9 8190
10 18600
11 18620
12 27846
13 30240
14 32760
15 55860
16 105664
17 117800
18 167400
19 173600
20 237510
21 242060
22 332640
23 360360
24 539400
25 695520
26 726180
27 753480
28 1089270
29 1421280
30 1539720
31 2229500
32 2290260
33 2457000

List of values

[1, 6, 140, 270, 672, 1638, 2970, 6200, 8190, 18600, 18620, 27846, 30240, 32760, 55860, 105664, 117800, 167400, 173600, 237510, 242060, 332640, 360360, 539400, 695520, 726180, 753480, 1089270, 1421280, 1539720, 2229500, 2290260, 2457000]

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

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