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

1,1

Links

Table of n, a(n) for n=1..8.

Example

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

Crossrefs

Cf. A116134, A054214, A116154, A116272.

Sequence in context: A058424 A204041 A065248 * A225876 A067508 A034250

Adjacent sequences: A116138 A116139 A116140 * A116142 A116143 A116144

Keyword

nonn,base

Author

Giovanni Resta, Feb 06 2006

Status

approved