1,1

Table of n, a(n) for n=1..18.

Some lists of iterated values started at a(n):

n=1: a(1)=first prime; n=2: a(2)=first true prime factor;

n=3: a(3)=first 2^j.3^i number, that is 6;

n=5: {22,112,72,32,2}

n=12: length=a(12); iv=501; fixed-point=1354674597313; list as follows

{501, 1673, 2397, 47173, 293237, 2571637, 23593109, 273116353, 522211523, 8866073119, 57914987307, 1354674597313}

Cf. A085307, A085308, A085309, A085317-A085323.

Sequence in context: A284886 A249339 A307676 * A219042 A325868 A251581

Adjacent sequences: A084682 A084683 A084684 * A084686 A084687 A084688

base,nonn

Labos Elemer, Jul 16 2003

approved