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.

A206030 Numbers m with at least two divisors d with the same sigma(d).

Table of values

n a(n)
1 66
2 132
3 170
4 198
5 210
6 260
7 264
8 322
9 330
10 340
11 345
12 396
13 400
14 420
15 456
16 462
17 510
18 520
19 528
20 594
21 630
22 644
23 651
24 660
25 680
26 690
27 726
28 780
29 792
30 800
31 820
32 840
33 850
34 858
35 912
36 924
37 966
38 990
39 1020
40 1035
41 1040
42 1050
43 1056
44 1066
45 1092
46 1122
47 1155
48 1160
49 1188

List of values

[66, 132, 170, 198, 210, 260, 264, 322, 330, 340, 345, 396, 400, 420, 456, 462, 510, 520, 528, 594, 630, 644, 651, 660, 680, 690, 726, 780, 792, 800, 820, 840, 850, 858, 912, 924, 966, 990, 1020, 1035, 1040, 1050, 1056, 1066, 1092, 1122, 1155, 1160, 1188]

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

Content is available under The OEIS End-User License Agreement.