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.

A245775 Numbers k such that A017666(k) = denominator(sigma(k)/k) = 3.

Table of values

n a(n)
1 3
2 12
3 84
4 234
5 270
6 1080
7 1488
8 1638
9 6048
10 6552
11 24384
12 35640
13 199584
14 435708
15 2142720
16 4713984
17 12999168
18 18506880
19 36197280
20 100651008
21 208565280
22 240589440
23 275890944
24 299980800
25 470564640
26 3899750400
27 4138364160
28 6039429120
29 13286744064
30 17827568640

List of values

[3, 12, 84, 234, 270, 1080, 1488, 1638, 6048, 6552, 24384, 35640, 199584, 435708, 2142720, 4713984, 12999168, 18506880, 36197280, 100651008, 208565280, 240589440, 275890944, 299980800, 470564640, 3899750400, 4138364160, 6039429120, 13286744064, 17827568640]

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

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