[Haskell-cafe] Zumkeller numbers

Frank Buss fb at frank-buss.de
Mon Dec 7 18:45:11 EST 2009

> From: daniel.is.fischer at web.de [mailto:daniel.is.fischer at web.de]

> > Not related to Haskell, but do you think semi-Zumkeller numbers are
> > semi-perfect numbers?
> The site you linked to says so. I've not investigated.

Peter Luschny posted the link in a discussion in a German newsgroup: 


Currently it is a conjecture and needs a proof before posting it to Sloane's integer sequences archive.

Frank Buss, fb at frank-buss.de
http://www.frank-buss.de, http://www.it4-systems.de

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