cp's OEIS Frontend

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.

A066228 The EulerPhi(sigma(EulerPhi))-perfect numbers, where the f-perfect numbers for an arithmetical function f are defined in A066218.

Table of values

n a(n)
1 2
2 4
3 28
4 40
5 448
6 500380

List of values

[2, 4, 28, 40, 448, 500380]

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

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