OFFSET
1,1
COMMENTS
For n=1023456789 there is no possible a(n), so the sequence is finite. - Eric Angelini, Dec 18 2006
a(123456788) is the last term. - Andrew Weimholt, Dec 19 2006
a(123456788) = 9099900999090090. - Sasha Semenov, Dec 25 2006
LINKS
R. Zumkeller, Table of n, a(n) for n = 1..10000
Hans Havermann, Graph of first 2600 terms
Sasha Semenov, Notes on computing this sequence [From rec.math]
CROSSREFS
KEYWORD
AUTHOR
Reinhard Zumkeller, Aug 16 2004
STATUS
approved