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.

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A328707 Dirichlet g.f.: Product_{k>=2} (1 + k^(-s)) / (1 - k^(-s)).

Original entry on oeis.org

1, 2, 2, 4, 2, 6, 2, 8, 4, 6, 2, 14, 2, 6, 6, 14, 2, 14, 2, 14, 6, 6, 2, 30, 4, 6, 8, 14, 2, 22, 2, 24, 6, 6, 6, 36, 2, 6, 6, 30, 2, 22, 2, 14, 14, 6, 2, 58, 4, 14, 6, 14, 2, 30, 6, 30, 6, 6, 2, 58, 2, 6, 14, 40, 6, 22, 2, 14, 6, 22, 2, 82, 2, 6, 14, 14, 6, 22, 2, 58
Offset: 1

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Author

Ilya Gutkovskiy, Oct 26 2019

Keywords

Comments

Dirichlet convolution of A001055 with A045778.

Crossrefs

Cf. A001055, A045778, A328709.

Formula

a(n) = Sum_{d|n} A001055(n/d) * A045778(d).
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Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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