A116168 Numbers k such that k concatenated with k+1 gives the product of two numbers which differ by 8.

19, 32, 16284704, 35576083, 15764836187996024260119639732979, 19807200907254352332962649366152, 20298517078413563250826300137112, 30190765850423053042937262322867, 30796637697589506772859224996627

Offset: 1

Author

Giovanni Resta, Feb 06 2006

Keywords

• nonn
• base

Comments

Also numbers k such that k concatenated with k+8 gives the product of two numbers which differ by 6.

Examples

			35576083//35576084 = 59645686 * 59645694, where // denotes concatenation.
35576083//35576091 = 59645687 * 59645693.
		

Crossrefs

Cf. A116161, A116167, A116169, A116174, A116299.

Cf. A116208, A115430, A116215, A116345.

Extensions

Edited by N. J. A. Sloane, Apr 15 2007