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A139378
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Number of 2-digit multiples of n whose digits sum to n.
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0
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OFFSET
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1,3
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LINKS
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EXAMPLE
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a(1)=1 as 10 is the only 2-digit multiple of 1 whose digits sum to 1, while a(3)=3 as the multiples 12, 21 and 30 have the property.
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CROSSREFS
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KEYWORD
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base,full,nonn,fini
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AUTHOR
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STATUS
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approved
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