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A115748 Numbers n such that sigma(n)=7*reversal(n). 1
63301, 651001, 6967932, 2158803990, 88858402692 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
a(6) > 10^12. - Giovanni Resta, Oct 28 2012
LINKS
EXAMPLE
2158803990 is in the sequence because sigma(2158803990)
=6951619584=7*993088512=7*reversal(2158803990).
CROSSREFS
Sequence in context: A209713 A230681 A209793 * A226003 A203921 A237918
KEYWORD
base,more,nonn
AUTHOR
Farideh Firoozbakht, Feb 12 2006
EXTENSIONS
a(5) from Donovan Johnson, Dec 21 2008
STATUS
approved

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Last modified March 28 22:04 EDT 2024. Contains 371254 sequences. (Running on oeis4.)