|
| |
|
|
A121111
|
|
Trajectory of 277777788888899 under "x -> product of digits of x" map.
|
|
1
| |
|
|
277777788888899, 4996238671872, 438939648, 4478976, 338688, 27648, 2688, 768, 336, 54, 20, 0
(list; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 1,1
|
|
|
COMMENTS
| This is the smallest number of persistence 11 (cf. A003001). It is conjectured that no number has persistence greater than 11.
|
|
|
LINKS
| N. J. A. Sloane, The persistence of a number, J. Recreational Math., 6 (1973), 97-98.
|
|
|
FORMULA
| a(n)=A121110(n-1), n>=3. [From R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Aug 07 2008]
|
|
|
CROSSREFS
| Cf. A003001.
Sequence in context: A086439 A086440 A172596 * A179660 A080125 A204350
Adjacent sequences: A121108 A121109 A121110 * A121112 A121113 A121114
|
|
|
KEYWORD
| nonn,fini,full,base
|
|
|
AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com), Aug 12 2006
|
|
|
EXTENSIONS
| Edited by Charles R Greathouse IV (charles.greathouse(AT)case.edu), Aug 05 2010
|
| |
|
|
