A116337 Numbers k such that k*(k+4) gives the concatenation of two numbers m and m+7.

8217108, 8030443878983905982, 43467818511541680701794365325328847002052, 56532181488458319298205634674671152997945

Offset: 1

Author

Giovanni Resta, Feb 06 2006

Keywords

• nonn
• base

Examples

			8217108 * 8217112 = 6752089//6752096, where // denotes concatenation.
		

Crossrefs

Cf. A116173, A116323, A116336, A116338, A116350.

Cf. A116304, A116257.