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Search: id:A116169
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| A116169 |
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Numbers n such that n concatenated with n+1 gives the product of two numbers which differ by 9. |
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+0
9
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| 9, 49, 1166975893986638437392162264780939, 1411174268292962563778302427727571, 1860631503683565562655236868895135
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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Also numbers n such that n concatenated with n+9 gives the product of two numbers which differ by 7.
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EXAMPLE
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49//50 = 66 * 75, where // denotes concatenation.
49//58 = 67 * 74.
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CROSSREFS
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Cf. A116162, A116168, A116175, A116300.
Cf. A116215, A116174, A116223, A116353.
Sequence in context: A050638 A088064 A080812 this_sequence A084367 A006974 A007681
Adjacent sequences: A116166 A116167 A116168 this_sequence A116170 A116171 A116172
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KEYWORD
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nonn,base
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AUTHOR
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Giovanni Resta (g.resta(AT)iit.cnr.it), Feb 06 2006
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EXTENSIONS
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Edited by N. J. A. Sloane (njas(AT)research.att.com), Apr 15 2007
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