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A116099
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Numbers k such that k concatenated with k-9 gives the product of two numbers which differ by 7.
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15
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OFFSET
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1,1
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COMMENTS
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Also numbers k such that k concatenated with k-3 gives the product of two numbers which differ by 5.
Also numbers k such that k concatenated with k+1 gives the product of two numbers which differ by 3.
Also numbers k such that k concatenated with k+3 gives the product of two numbers which differ by 1.
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LINKS
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Table of n, a(n) for n=1..8.
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EXAMPLE
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79493157//79493154 = 89158933 * 89158938, where // denotes concatenation.
79493157//79493158 = 89158934 * 89158937.
79493157//79493160 = 89158935 * 89158936.
79493157//79493148 = 89158932 * 89158939.
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CROSSREFS
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Cf. A116098, A116193, A116107, A116230, A116130, A116136, A116205, A116107, A116268.
Cf. A115426, A115428, A116171, A116296, A116170, A116177, A116307.
Sequence in context: A268847 A211212 A175049 * A116238 A136114 A278074
Adjacent sequences: A116096 A116097 A116098 * A116100 A116101 A116102
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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 12 2007
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STATUS
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approved
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