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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.

A326051 1/2 times 3-perfect (triply perfect, tri-perfect, triperfect or sous-double) numbers: a(n) = A005820(n)/2.

Original entry on oeis.org

60, 336, 261888, 229909120, 738152448, 25500590080
Offset: 1

Views

Author

Antti Karttunen, Jun 12 2019

Keywords

Comments

If any odd perfect numbers exist, they should occur in this sequence, unless it is already complete, as some people believe. Please see comments and links in A005820.

Links

Crossrefs

Cf. A005820.

Formula

a(n) = A005820(n)/2.

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