A116351 Numbers k such that k*(k+5) gives the concatenation of two numbers m and m+9.

8446, 8811, 69125298546226023972, 69855225553525294045, 74604750601020544520, 75334677608319814593, 92496418993920707747, 93226346001219977820, 97975871048715228295, 98705798056014498368

Offset: 1

Author

Giovanni Resta, Feb 06 2006

Keywords

• nonn
• base

Examples

			8811 * 8816 = 7767//7776, where // denotes concatenation.
		

Crossrefs

Cf. A028557, A116180, A116338, A116350, A116352.