[seqfan] Re: zig-zag pseudoprimes

[Douglas McNeil]

> This is all subject to checking by an independent committee.

I find the sequence begins

[91, 561, 781, 1105, 1661, 1729, 2465, 2737, 2821, 6601, 8911, 10585, 15841]

which starts exactly the way predicted.  It also seems every
Carmichael number <= 512461 is a zig-zag pseudoprime, and the
non-Carmichael numbers seen so far show up in other pseudoprime
sequences.


Doug

-- 
Department of Earth Sciences
University of Hong Kong