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A116304 Numbers k such that k*(k+6) gives the concatenation of two numbers m and m+2. 6
8217107, 8030443878983905981, 43467818511541680701794365325328847002051, 56532181488458319298205634674671152997944 (list; graph; refs; listen; history; text; internal format)
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

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Last modified October 26 14:28 EDT 2021. Contains 348267 sequences. (Running on oeis4.)