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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.

A342021 Numbers k such that A003415(sigma(k)) = k, where A003415 is the arithmetic derivative, and sigma is the sum of divisors of n.

Table of values

n	a(n)
1	5
2	8
3	41
4	47057

List of values

[5, 8, 41, 47057]

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

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