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.

A034897 Hyperperfect numbers: x such that x = 1 + k*(sigma(x)-x-1) for some k > 0.

Table of values

n a(n)
1 6
2 21
3 28
4 301
5 325
6 496
7 697
8 1333
9 1909
10 2041
11 2133
12 3901
13 8128
14 10693
15 16513
16 19521
17 24601
18 26977
19 51301
20 96361
21 130153
22 159841
23 163201
24 176661
25 214273
26 250321
27 275833
28 296341
29 306181
30 389593
31 486877
32 495529
33 542413
34 808861
35 1005421
36 1005649
37 1055833

List of values

[6, 21, 28, 301, 325, 496, 697, 1333, 1909, 2041, 2133, 3901, 8128, 10693, 16513, 19521, 24601, 26977, 51301, 96361, 130153, 159841, 163201, 176661, 214273, 250321, 275833, 296341, 306181, 389593, 486877, 495529, 542413, 808861, 1005421, 1005649, 1055833]

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

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