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.

A064595 Nontrivial nonunitary multiply perfect numbers: the sum of the nonunitary divisors of n is a positive multiple of n; i.e., (sigma(n) - usigma(n))/n is a positive integer.

Table of values

n a(n)
1 24
2 112
3 1984
4 2520
5 31320
6 32512
7 1163160
8 2208384
9 3053232
10 6535296
11 13472928
12 123165600
13 134201344
14 186076800
15 365959296
16 3456573120
17 4401782352
18 5517818880
19 18924364800
20 34359476224
21 325377803520

List of values

[24, 112, 1984, 2520, 31320, 32512, 1163160, 2208384, 3053232, 6535296, 13472928, 123165600, 134201344, 186076800, 365959296, 3456573120, 4401782352, 5517818880, 18924364800, 34359476224, 325377803520]

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

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