A116298 n times n+7 gives the concatenation of two numbers m and m+1.

6, 699, 776, 790, 867, 42337, 57657, 96883, 44121666, 55878328, 85298137, 36680703009575609347721358493, 63319296990424390652278641501, 69346342454876071597336150481, 81501115172242572470460459683

Offset: 1

Author

Giovanni Resta, Feb 06 2006

Keywords

• nonn
• base

Examples

			85298137 * 85298144 = 72757727//72757728, where // denotes
concatenation.
		

Crossrefs

Cf. A116167, A116291, A116297, A116299, A116311.