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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.

A067385 a(n) is smallest x such that sigma(phi(x))/sigma(x) = n.

Table of values

n	a(n)
1	1
2	13
3	181
4	121679
5	1033474069

List of values

[1, 13, 181, 121679, 1033474069]

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

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