A116171 Numbers k such that k concatenated with k+2 gives the product of two numbers which differ by 3.

8, 52, 63716866, 48793687600063875363014809897052, 60020753655608135708762056127156, 60446518621981165303188950156776, 71135436903815748345367595855336, 72876856643103028189103298533248

Offset

1,1

Comments

Also numbers k such that k concatenated with k+4 gives the product of two numbers which differ by 1.

Links

Table of n, a(n) for n=1..8.

Example

63716866//63716868 = 79822844 * 79822847, where // denotes concatenation.
63716866//63716870 = 79822845 * 79822846.

Crossrefs

Cf. A116099, A116170, A116172, A116112, A116302, A116099, A115428, A116314.

Sequence in context: A359126 A199700 A302865 * A303966 A304928 A305344

Adjacent sequences: A116168 A116169 A116170 * A116172 A116173 A116174

Keyword

nonn,base

Author

Giovanni Resta, Feb 06 2006

Extensions

Edited by N. J. A. Sloane, Apr 13 2007

Status

approved