[seqfan] Re: Interspersion/fractal with prime sums

franktaw at netscape.net franktaw at netscape.net
Sun May 2 09:27:06 CEST 2010

While this sequence has fractal-like properties, it is not technically 
a fractal sequence. "Interspersion" is not used loosely as "fractal 
sequence" sometimes is, and is provably equivalent to the technical 
definition of a fractal sequence; so it is certainly not an 

Franklin T. Adams-Watters

-----Original Message-----
From: Eric Angelini <Eric.Angelini at kntv.be>

Hello SeqFans,

I guess the sequence hereunder is an "interspersion" or a "fractal"
(please correct me):

"a(n)+a(n+1) is prime and all even terms rebuild the sequence itself":


All [primes minus 1] will appear, of course -- and will be the only
even terms of the sequence; the building process is quite visible.

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