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

Author

Giovanni Resta, Feb 06 2006

Keywords

• nonn
• base

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.

Examples

			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.

Extensions

Edited by N. J. A. Sloane, Apr 12 2007