A116304 Numbers k such that k*(k+6) gives the concatenation of two numbers m and m+2.

8217107, 8030443878983905981, 43467818511541680701794365325328847002051, 56532181488458319298205634674671152997944

Offset

1,1

Links

Table of n, a(n) for n=1..4.

Example

8217107 * 8217113 = 6752089//6752091, where // denotes concatenation.

Crossrefs

Cf. A116173, A116290, A116303, A116305, A116318.

Sequence in context: A277580 A059693 A083629 * A116337 A234049 A233484

Adjacent sequences: A116301 A116302 A116303 * A116305 A116306 A116307

Keyword

nonn,base

Author

Giovanni Resta, Feb 06 2006

Status

approved