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Search: id:A061724
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| A061724 |
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Smallest number which has more different digits than its n-th power, or -1 if no such number exists. |
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+0
1
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OFFSET
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2,1
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COMMENT
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8*10^7 <= a(8) <= 134267085 - Stefan Steinerberger (stefan.steinerberger(AT)gmail.com), Sep 07 2007
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EXAMPLE
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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
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CROSSREFS
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Cf. A061277, A061374.
Sequence in context: A061699 A096214 A059936 this_sequence A125044 A096209 A087303
Adjacent sequences: A061721 A061722 A061723 this_sequence A061725 A061726 A061727
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KEYWORD
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nonn,base,hard,more
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AUTHOR
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Ulrich Schimke (ulrschimke(AT)aol.com)
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EXTENSIONS
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a(6) and a(7) from Stefan Steinerberger (stefan.steinerberger(AT)gmail.com), Sep 07 2007
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