A116342 n times n+9 gives the concatenation of two numbers m and m+7.

4415, 5577, 7840, 3188375836088211088457055570, 4940200653606459263639537322, 5059799346393540736360462670, 6811624163911788911542944422, 6977607565571622928141284588

Offset: 1

Author

Giovanni Resta, Feb 06 2006

Keywords

• nonn
• base

Examples

			7840 * 7849 = 6153//6160, where // denotes concatenation.
		

Crossrefs

Cf. A116211, A116334, A116341, A116347.