A116115 Numbers k such that k concatenated with k-6 gives the product of two numbers which differ by 1.

58, 1552909498221642960203840517299022287877411846, 1723404686015903064905313664707396376746205762, 2153694542826970975147295558223788704098018912

Offset: 1

Author

Giovanni Resta, Feb 06 2006

Keywords

• nonn
• base

Examples

			58//52 = 76 * 77, where // denotes concatenation.
		

Crossrefs

Cf. A116101, A116116, A116120, A116246.