A121107 Trajectory of 68889 under "x -> product of digits of x" map.

68889, 27648, 2688, 768, 336, 54, 20, 0

Offset

1,1

Comments

This is the smallest number of persistence 7 (cf. A003001).

Links

Table of n, a(n) for n=1..8.

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

Crossrefs

Cf. A003001.

Sequence in context: A031863 A213702 A233721 * A046516 A199997 A250500

Adjacent sequences: A121104 A121105 A121106 * A121108 A121109 A121110

Keyword

nonn,fini,full,base

Author

N. J. A. Sloane, Aug 12 2006

Extensions

Edited by Charles R Greathouse IV, Aug 06 2010

Status

approved