A121105 Trajectory of 679 under "x -> product of digits of x" map.

679, 378, 168, 48, 32, 6

Offset

1,1

Comments

This is the smallest number of persistence 5 (cf. A003001).

Links

Table of n, a(n) for n=1..6.

N. J. A. Sloane, The persistence of a number, J. Recreational Math., 6 (1973), 97-98.

Crossrefs

Cf. A003001.

Sequence in context: A250872 A186127 A097771 * A046514 A199995 A352263

Adjacent sequences: A121102 A121103 A121104 * A121106 A121107 A121108

Keyword

nonn,fini,full,base

Author

N. J. A. Sloane, Aug 12 2006

Extensions

Edited by Charles R Greathouse IV, Aug 05 2010

Status

approved