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A116268 Numbers k such that k*(k+5) gives the concatenation of two numbers m and m-3. 5
81, 77394227, 89158933, 36623663376237623663376335, 37633762366336633762366235, 62366237633663366237633761, 63376336623762376336623661, 86194223018927804587702128 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
EXAMPLE
89158933 * 89158938 = 79493157//79493154, where // denotes concatenation.
CROSSREFS
Sequence in context: A277844 A162284 A309110 * A128838 A231484 A340398
KEYWORD
nonn,base
AUTHOR
Giovanni Resta, Feb 06 2006
STATUS
approved

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Last modified April 16 02:41 EDT 2024. Contains 371696 sequences. (Running on oeis4.)