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.

A128398 Numbers k such that k^2 divides 18^k - 1.

Original entry on oeis.org

1, 17, 128583032925805678351
Offset: 1

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Author

Alexander Adamchuk, Mar 08 2007

Keywords

Comments

17 divides a(n) for n > 1.
a(4) > 10^50. - Max Alekseyev, Mar 01 2025

Crossrefs

Subsequence of A128358.
Cf. A127103, A127104, A127105, A127106, A127107, A127102, A127101, A127100, A127092, A128405, A128393, A128394, A128395, A128396, A128397, A128398, A128399, A128400, A128401, A128402, A128403, A128404.

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