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A116302 Numbers k such that k*(k+3) gives the concatenation of two numbers m and m+2. 5
27, 71, 79822844, 69852478553064869297984899963806, 77473062193002372448027740546438, 77747359197583788609974143907618, 84341826458653210947638195982114, 85367942837521291760016984490250 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
EXAMPLE
79822844 * 79822847 = 63716866//63716868, where // denotes concatenation.
CROSSREFS
Sequence in context: A116353 A224525 A219130 * A181976 A039414 A043237
KEYWORD
nonn,base
AUTHOR
Giovanni Resta, Feb 06 2006
STATUS
approved

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Last modified June 18 02:31 EDT 2024. Contains 373468 sequences. (Running on oeis4.)