A116099 Numbers k such that k concatenated with k-9 gives the product of two numbers which differ by 7.

69, 59898667, 79493157, 13412927190959690154913903, 14163000698458955079906403, 38895475965785687555173929, 40165600438484442828161229, 74294440818366638194239027

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