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.

A098185 If f(x) = (sum of unitary proper divisors of x) = A063919(x) is iterated, the iteration may lead to a fixed point which is either equals 0 or it is from A002827, a unitary perfect number > 1: 6,60,90,87360... Here initial values are collected for which the iteration ends in a unitary perfect number > 1.

Table of values

n a(n)
1 6
2 60
3 66
4 78
5 90
6 244
7 292
8 476
9 482
10 578
11 648
12 680
13 688
14 770
15 784
16 832
17 864
18 956
19 958
20 976
21 1168
22 1354
23 1360
24 1392
25 1488
26 1600
27 1658
28 1670
29 1906
30 2232
31 2264
32 2294
33 2376
34 2480
35 2552
36 2572
37 2576
38 2626
39 2712
40 2732
41 2806
42 2842
43 2870
44 2904
45 2912
46 2992
47 3024

List of values

[6, 60, 66, 78, 90, 244, 292, 476, 482, 578, 648, 680, 688, 770, 784, 832, 864, 956, 958, 976, 1168, 1354, 1360, 1392, 1488, 1600, 1658, 1670, 1906, 2232, 2264, 2294, 2376, 2480, 2552, 2572, 2576, 2626, 2712, 2732, 2806, 2842, 2870, 2904, 2912, 2992, 3024]

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

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