A116238 Numbers k such that k*(k+7) gives the concatenation of two numbers m and m-8.

69, 79822842, 69852478553064869297984899963804, 77473062193002372448027740546436, 77747359197583788609974143907616, 84341826458653210947638195982112, 85367942837521291760016984490248

Offset: 1

Author

Giovanni Resta, Feb 06 2006

Keywords

• nonn
• base

Examples

			79822842 * 79822849 = 63716866//63716858, where // denotes concatenation.
		

Crossrefs

Cf. A116107, A116230, A116237, A116239, A116243.