A116141 Numbers k such that k concatenated with k-2 gives the product of two numbers which differ by 1.

4, 5303944, 6677714, 2070936216988528558, 2969428172738875624, 6685545813563350444, 8013829604553736451395958429212, 9724110515510343256451213152382

Offset: 1

Author

Giovanni Resta, Feb 06 2006

Keywords

• nonn
• base

Examples

			6677714//6677712 = 8171728 * 8171729, where // denotes
concatenation.
		

Crossrefs

Cf. A116134, A054214, A116154, A116272.