1,2

Primes: a(n+1) > 2*a(n).

Table of n, a(n) for n=1..29.

Cf. A102440.

A056637 describes another iteration that reduces primes to 2 and 3.

Sequence in context: A306662 A052940 A191304 * A132177 A340340 A046138

Adjacent sequences: A102441 A102442 A102443 * A102445 A102446 A102447

nonn

Reinhard Zumkeller, Jan 09 2005

More terms from David Wasserman, Apr 04 2008

approved