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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A280117 Partial products of A266265 (Product_{d|n} pod(d)), where pod(n) is the product of the divisors of n (A007955).

Original entry on oeis.org

1, 2, 6, 96, 480, 103680, 725760, 743178240, 60197437440, 60197437440000, 662171811840000, 1977234435405250560000, 25704047660268257280000, 70531906779776097976320000, 238045185381744330670080000000, 249608468306847943276709806080000000
Offset: 1

Views

Author

Jaroslav Krizek, Dec 26 2016

Keywords

Crossrefs

Cf. A007955, A175317, A266265, A280115 (partial sums of A175317), A280116 (partial sums of A266265).

Programs

  • Magma
    [&*[&*[&*[b: b in Divisors(d)]: d in Divisors(k)]: k in [1..n]]: n in [1..1000]]

Formula

a(n) = Product_{i=1..n} A266265(i).
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