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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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8
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OFFSET
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1,1
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COMMENTS
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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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LINKS
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Table of n, a(n) for n=1..5.
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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: A088064 A080812 A276239 * A280549 A084367 A006974
Adjacent sequences: A116166 A116167 A116168 * 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, Feb 06 2006
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EXTENSIONS
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Edited by N. J. A. Sloane, Apr 15 2007
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STATUS
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approved
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