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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.

A064020 Numbers n such that sf(n) = phi(n), where sf(n) = A013928(n).

Table of values

n a(n)
1 2
2 3
3 9
4 33
5 363
6 1089
7 1653
8 3237
9 4297761
10 32348343651

List of values

[2, 3, 9, 33, 363, 1089, 1653, 3237, 4297761, 32348343651]

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