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 A116099 Numbers k such that k concatenated with k-9 gives the product of two numbers which differ by 7. 15
 69, 59898667, 79493157, 13412927190959690154913903, 14163000698458955079906403, 38895475965785687555173929, 40165600438484442828161229, 74294440818366638194239027 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS 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. LINKS Table of n, a(n) for n=1..8. EXAMPLE 79493157//79493154 = 89158933 * 89158938, where // denotes concatenation. 79493157//79493158 = 89158934 * 89158937. 79493157//79493160 = 89158935 * 89158936. 79493157//79493148 = 89158932 * 89158939. CROSSREFS 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 A365913 Adjacent sequences: A116096 A116097 A116098 * A116100 A116101 A116102 KEYWORD nonn,base AUTHOR Giovanni Resta, Feb 06 2006 EXTENSIONS Edited by N. J. A. Sloane, Apr 12 2007 STATUS approved

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Last modified June 23 08:04 EDT 2024. Contains 373629 sequences. (Running on oeis4.)