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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.

A291258 a(n) is the smallest number k such that sigma(k) - phi(k) = n*k, or 0 if no such k exists.

Table of values

n	a(n)
0	1
1	2
2	12
3	75960
4	17156160

List of values

[1, 2, 12, 75960, 17156160]

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

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