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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
| 1,1
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COMMENTS
| 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
| 49//50 = 66 * 75, where // denotes concatenation.
49//58 = 67 * 74.
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CROSSREFS
| Cf. A116162, A116168, A116175, A116300.
Cf. A116215, A116174, A116223, A116353.
Sequence in context: A050638 A088064 A080812 * A084367 A006974 A171480
Adjacent sequences: A116166 A116167 A116168 * A116170 A116171 A116172
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KEYWORD
| nonn,base
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AUTHOR
| Giovanni Resta (g.resta(AT)iit.cnr.it), Feb 06 2006
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EXTENSIONS
| Edited by N. J. A. Sloane (njas(AT)research.att.com), Apr 15 2007
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