A116350 Numbers k such that k*(k+4) gives the concatenation of two numbers m and m+9.

33, 64, 45211541, 54788456, 78317868, 72388446037855609175404258, 73247326752475247326752673, 75267524732673267524732473, 76126405447292905676080888, 42053270820132695893502981749304

Offset: 1

Author

Giovanni Resta, Feb 06 2006

Keywords

• nonn
• base

Examples

			78317868 * 78317872 = 61336887//61336896, where // denotes concatenation.
		

Crossrefs

Cf. A116187, A116337, A116349, A116351.