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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.

A033854 Numbers k such that j(k)*ud(k)=phi(k), j(n) = A033831, ud(n) = number of unitary divisors of n (A034444).

Table of values

n a(n)
1 3
2 4
3 8
4 15
5 20
6 28
7 40
8 102
9 132
10 140
11 252
12 360
13 510
14 780

List of values

[3, 4, 8, 15, 20, 28, 40, 102, 132, 140, 252, 360, 510, 780]

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

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