OFFSET
1,1
COMMENTS
k can never be 1, 4, or 7, because if it were, k*10^m - 1 would be divisible by 3.
LINKS
Jon E. Schoenfield, Table of n, a(n) for n = 1..71 (next term is 8*10^1219 - 1)
CROSSREFS
KEYWORD
base,nonn
AUTHOR
Lekraj Beedassy, Aug 02 2008
EXTENSIONS
59999999 from Howard Berman (howard_berman(AT)hotmail.com), Apr 22 2009
Two more terms from Jon E. Schoenfield, Jan 12 2019
STATUS
approved