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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
EXAMPLE
8217107 * 8217113 = 6752089//6752091, where // denotes concatenation.
CROSSREFS
Sequence in context: A277580 A059693 A083629 * A116337 A234049 A233484
KEYWORD
nonn,base
AUTHOR
Giovanni Resta, Feb 06 2006
STATUS
approved

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Last modified June 19 17:22 EDT 2024. Contains 373504 sequences. (Running on oeis4.)