a puzzle sequence

N. J. A. Sloane njas at research.att.com
Tue Jul 26 14:49:34 CEST 2005

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SeqFans,  this just came in. Can anyone solve it?
I don't know the answer.  NJAS


> need help with a math thing
> 
> 
> 87   711   43   269   65   555   39   421   17   ___    ___    ___
> 
> What are three numbers?  What is the pattern?  What do they have in common?
> 
> If you could help it would be great!!

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