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.

A033857 Numbers n such that j(n)*phi(n) = usigma(n), where j(n) = A033831, usigma(n) = sum of unitary divisors of n (A034448).

Original entry on oeis.org

35, 44, 56, 105, 198, 418, 1254
Offset: 1

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If it exists, a(8) > 10^9. - Sean A. Irvine, Jul 20 2020

Crossrefs

Cf. A000010 (phi), A034448 (usigma), A033831.