A115748 Numbers n such that sigma(n)=7*reversal(n).

63301, 651001, 6967932, 2158803990, 88858402692

Offset

1,1

Comments

a(6) > 10^12. - Giovanni Resta, Oct 28 2012

Links

Table of n, a(n) for n=1..5.

Example

2158803990 is in the sequence because sigma(2158803990)
=6951619584=7*993088512=7*reversal(2158803990).

Crossrefs

Cf. A069216, A105324, A114928.

Sequence in context: A209713 A230681 A209793 * A226003 A203921 A237918

Adjacent sequences: A115745 A115746 A115747 * A115749 A115750 A115751

Keyword

base,more,nonn

Author

Farideh Firoozbakht, Feb 12 2006

Extensions

a(5) from Donovan Johnson, Dec 21 2008

Status

approved