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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.

A176803 a(n) = the smallest natural numbers m such that product of antiharmonic mean of the divisors of n and antiharmonic mean of the divisors of m are integers, a(n) = 0 if no such number exists.

Table of values

n a(n)
1 1
2 4
3 0
4 1
5 4
6 0
7 0
8 4
9 1
10 100
11 0
12 0
13 9
14 0
15 0
16 1
17 100
18 4
19 0
20 1
21 0
22 0
23 0
24 0
25 1
26 25
27 0
28 0
29 325
30 0

List of values

[1, 4, 0, 1, 4, 0, 0, 4, 1, 100, 0, 0, 9, 0, 0, 1, 100, 4, 0, 1, 0, 0, 0, 0, 1, 25, 0, 0, 325, 0]

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

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