what sequences most need extending?

Ralf Stephan ralf at ark.in-berlin.de
Tue May 24 09:23:43 CEST 2005

Hugo wrote 
> Some others of my personal favorites:

Yes, and permanents of matrices would be a good choice. Just
search for the word 'permanents'.

If they want to work in parallel with factorization then A099497
is another, I can say that 60^59-59^60 is probably a semiprime
as the probability of it having a factor <=40 digits is < 1/e but
what are the factors? Best program for that is Zimmermann's ecm6
found on ECMNET.


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