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A116272 n times n+1 gives the concatenation of two numbers m and m-2. 4
6, 7282818, 8171728, 4550754022124826467, 5449245977875173533, 8176518705147900806, 8951999555715882882349355522889, 9861090464806791973258446431980 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
EXAMPLE
8171728 * 8171729 = 6677714//6677712, where // denotes
concatenation.
CROSSREFS
Sequence in context: A297528 A172876 A269516 * A273723 A182792 A067484
KEYWORD
nonn,base
AUTHOR
Giovanni Resta, Feb 06 2006
STATUS
approved

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Last modified May 29 11:04 EDT 2024. Contains 372938 sequences. (Running on oeis4.)