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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A365242 Numbers k such that k+1, k-1, k/2+1, k/2-1, k/3+1 and k/3-1 are all prime.

Original entry on oeis.org

12, 540540, 928620, 960120, 9074520, 10199700, 26460000, 44186940, 46787580, 66459960, 67723740, 71901900, 94884300, 98698320, 109495260, 115796520, 126556920, 134276940, 140943600, 157861620, 196226100, 197520120, 202498380
Offset: 1

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Author

Joshua Graham, Aug 28 2023

Keywords

Comments

It can be proven that except for a(1) = 12, a(n) = {0, 1260, 3780, 10080, 12600} (mod 13860).

Crossrefs

Cf. A076504.
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Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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