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A255678
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Smallest number m needing exactly n distinct digits in decimal representation of m*(m+1)/2.
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3
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OFFSET
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1,2
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COMMENTS
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LINKS
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PROG
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(Haskell)
a255678 n = head $ filter ((== n) . a118668) [0..]
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CROSSREFS
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KEYWORD
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nonn,base,fini,full
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AUTHOR
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STATUS
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approved
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