A116307 Numbers k such that k*(k+1) gives the concatenation of two numbers m and m+3.

83, 77394229, 89158935, 36623663376237623663376337, 37633762366336633762366237, 62366237633663366237633763, 63376336623762376336623663, 86194223018927804587702130

Offset: 1

Author

Giovanni Resta, Feb 06 2006

Keywords

• nonn
• base

Examples

			89158935 * 89158936 = 79493157//79493160, where // denotes concatenation.
		

Crossrefs

Cf. A116099, A116301, A116308, A116314.