OFFSET
1,2
LINKS
Hans Havermann, Table of A093211-A093299
EXAMPLE
a(4) is 9900990 because its length-4 substrings (9900, 9009, 0099, 0990) are all distinct and divisible by 99 and there is no larger number with this property.
CROSSREFS
KEYWORD
base,nonn,more
AUTHOR
Hans Havermann, Mar 29 2004
EXTENSIONS
a(9)-a(13) from John Cerkan, Jun 14 2017
STATUS
approved