OFFSET
1,2
COMMENTS
Since there exists no number k <= 10^200 with multiplicative persistence 12, a(n) = (10^(n-15)-1)/9*10^15 + 277777788888899 for 15 <= n <= 200. - A.H.M. Smeets, Sep 18 2018
LINKS
N. J. A. Sloane, The persistence of a number, J. Recreational Math., 6 (1973), 97-98.
Eric Weisstein's World of Mathematics, Multiplicative Persistence.
CROSSREFS
KEYWORD
nonn,base
AUTHOR
EXTENSIONS
a(8)-a(18) from Donovan Johnson, Mar 30 2010
STATUS
approved