a puxxle

franktaw at netscape.net franktaw at netscape.net
Wed Apr 19 19:46:41 CEST 2006

That doesn't work.  That would be 1,3,8,19, not 1,3,8,18.

It could almost be a(n) = 2a(n-1)+a(n-3)+1.  That would give us:

Franklin T. Adams-Watters

-----Original Message-----
From: Robert G. Wilson v <rgwv at rgwv.com>


 I find it difficult to believe that a order three recursion
 is what the 'feds' were after. Might I suggest that what they wanted
 was A079583: a(0)=1 a(n)=2*a(n-1)+n.


 > Dear all,
 > > >>>:%S A117713 1,3,8,18,__,89,189

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