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A116094
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Numbers k such that k concatenated with k-9 gives the product of two numbers which differ by 1.
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3
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15, 771, 939, 2099721, 2935179, 5235841, 5424812334857206131, 6846608332924813315, 1458115445754267551129074204621, 3821059872421656136462055529015, 5557540612916539470512122318065
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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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5235841//5235832 = 7235911 * 7235912, 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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