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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.

User: Carl Schildkraut

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Carl Schildkraut has authored 1 sequences.

A257665 Totient of the n-th perfect number.

Original entry on oeis.org

2, 12, 240, 4032, 16773120, 4294901760, 68719214592, 1152921503533105152, 1329227995784915871750885555673497600, 95780971304118053647396688887409314154826126411694080, 6582018229284824168619876730229320890292528855852623664389292032
Offset: 1

Views

Author

Carl Schildkraut, Jul 12 2015

Keywords

Crossrefs

Cf. A000010, A000396, subsequence of A098203.

Programs

Formula

a(n) = A000010(A000396(n)).

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

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