A116272 n times n+1 gives the concatenation of two numbers m and m-2.

6, 7282818, 8171728, 4550754022124826467, 5449245977875173533, 8176518705147900806, 8951999555715882882349355522889, 9861090464806791973258446431980

Offset: 1

Author

Giovanni Resta, Feb 06 2006

Keywords

• nonn
• base

Examples

			8171728 * 8171729 = 6677714//6677712, where // denotes
concatenation.
		

Crossrefs

Cf. A116141, A116265, A116273, A116285.