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.

A214842 Anti-multiply-perfect numbers. Numbers n for which sigma*(n)/n is an integer, where sigma*(n) is the sum of the anti-divisors of n.

Table of values

n a(n)
1 1
2 2
3 5
4 8
5 41
6 56
7 77
8 946
9 1568
10 2768
11 5186
12 6874
13 8104
14 17386
15 27024
16 84026
17 167786
18 2667584
19 4775040
20 4921776
21 27914146
22 505235234
23 3238952914
24 73600829714
25 455879783074
26 528080296234
27 673223621664
28 4054397778846
29 4437083907194
30 4869434608274
31 6904301600914
32 7738291969456

List of values

[1, 2, 5, 8, 41, 56, 77, 946, 1568, 2768, 5186, 6874, 8104, 17386, 27024, 84026, 167786, 2667584, 4775040, 4921776, 27914146, 505235234, 3238952914, 73600829714, 455879783074, 528080296234, 673223621664, 4054397778846, 4437083907194, 4869434608274, 6904301600914, 7738291969456]

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

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