A116304 Numbers k such that k*(k+6) gives the concatenation of two numbers m and m+2.

8217107, 8030443878983905981, 43467818511541680701794365325328847002051, 56532181488458319298205634674671152997944

Offset: 1

Author

Giovanni Resta, Feb 06 2006

Keywords

• nonn
• base

Examples

			8217107 * 8217113 = 6752089//6752091, where // denotes concatenation.
		

Crossrefs

Cf. A116173, A116290, A116303, A116305, A116318.