A116353 Numbers k such that k*(k+7) gives the concatenation of two numbers m and m+9.

27, 67, 3416102887775247376839416334668636, 3756559953325598880263233435801765, 4313503800489302411917772257282209

Offset: 1

Author

Giovanni Resta, Feb 06 2006

Keywords

• nonn
• base

Examples

			67 * 74 = 49//58, where // denotes concatenation.
		

Crossrefs

Cf. A116169, A116346, A116352, A116354.