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A116311 Numbers k such that k*(k+7) gives the concatenation of two numbers m and m+3. 5
8445, 8810, 69125298546226023971, 69855225553525294044, 74604750601020544519, 75334677608319814592, 92496418993920707746, 93226346001219977819, 97975871048715228294, 98705798056014498367 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
EXAMPLE
8810 * 8817 = 7767//7770, where // denotes concatenation.
CROSSREFS
Sequence in context: A093221 A023321 A116258 * A116351 A253147 A046336
KEYWORD
nonn,base
AUTHOR
Giovanni Resta, Feb 06 2006
STATUS
approved

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Last modified July 18 21:02 EDT 2024. Contains 374388 sequences. (Running on oeis4.)