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.

A262043 Carmichael numbers (A002997) that are not absolute Euler pseudoprimes (A033181).

Original entry on oeis.org

561, 1105, 2821, 6601, 8911, 10585, 29341, 52633, 62745, 63973, 101101, 115921, 126217, 188461, 252601, 278545, 294409, 314821, 334153, 340561, 410041, 512461, 552721, 658801, 748657, 825265, 852841, 1024651, 1033669, 1082809, 1152271, 1193221, 1461241, 1569457, 1909001
Offset: 1

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Author

Daniel Lignon, Sep 09 2015

Keywords

Comments

These are composite numbers n such that b^(n-1) == 1 (mod n) and abs(b^((n-1)/2) mod n) <> 1 for every b coprime to n.

Crossrefs

Cf. A002997 (Carmichael numbers), A033181 (absolute Euler pseudoprimes).