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A116211
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Numbers k such that k concatenated with k+7 gives the product of two numbers which differ by 9.
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4
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1953, 3115, 6153, 1016574047215119910181525023, 2440558249789368730986767575, 2560156942576450203707692923, 4639822375038697733267413875, 4868700733912235016077891029
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OFFSET
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1,1
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LINKS
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EXAMPLE
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6153//6160 = 7840 * 7849, where // denotes concatenation.
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CROSSREFS
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KEYWORD
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nonn,base
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AUTHOR
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STATUS
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approved
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