A116246 n times n+1 gives the concatenation of two numbers m and m-6.

76, 3940697271069731588503127963131864400305034240, 4151390954867901940837042502762708788079731027, 4640791465716781132715600310864305127175798262

Offset: 1

Author

Giovanni Resta, Feb 06 2006

Keywords

• nonn
• base

Examples

			76 * 77 = 58//52, where // denotes concatenation.
		

Crossrefs

Cf. A116115, A116232, A116247, A116251.

Formula

a(n) = A116234(n)+1. - R. J. Mathar, Apr 24 2007