A084685 a(n) is the least x such that length of fixed-point-list when function-A085307[] was iterated and started at a(n) equals n.

2, 4, 6, 14, 22, 115, 55, 105, 155, 145, 341, 501, 489, 143, 437, 301, 395, 665

Offset

1,1

Links

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

Example

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}

Crossrefs

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

Sequence in context: A249339 A332754 A307676 * A219042 A325868 A251581

Adjacent sequences: A084682 A084683 A084684 * A084686 A084687 A084688

Keyword

base,nonn

Author

Labos Elemer, Jul 16 2003

Status

approved