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A061724 Smallest number which has more different digits than its n-th power, or -1 if no such number exists. 0
109, 1920, 26730, 4385270, 13486709, 13652048, 134267085, 285963417, 341872690, 1032479568, 1026349857, 1027563984, 1029637584, 1239574806, 2059716348, 1654923078 (list; graph; refs; listen; history; text; internal format)
OFFSET

2,1

LINKS

Table of n, a(n) for n=2..17.

EXAMPLE

1920 is the smallest number which has more different digits than its cube (4 digits vs. 3 digits in 7077888000 = 1920^3), hence a(3) = 1920

CROSSREFS

Cf. A061277, A061374.

Sequence in context: A173665 A059936 A201849 * A145852 A144930 A190827

Adjacent sequences:  A061721 A061722 A061723 * A061725 A061726 A061727

KEYWORD

nonn,base,hard,more

AUTHOR

Ulrich Schimke (ulrschimke(AT)aol.com)

EXTENSIONS

a(6) and a(7) from Stefan Steinerberger, Sep 07 2007

a(8)-a(17) from Sean A. Irvine, Dec 02 2010

STATUS

approved

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Last modified June 19 03:57 EDT 2013. Contains 226386 sequences.