OFFSET
1,2
LINKS
Hans Havermann, Table of A093211-A093299
EXAMPLE
a(4) is 90091001 because its length-4 substrings (9009, 0091, 0910, 9100, 1001) are all distinct and divisible by 91 and there is no larger number with this property.
CROSSREFS
KEYWORD
base,nonn
AUTHOR
Hans Havermann, Mar 29 2004
EXTENSIONS
a(11)-a(13) from John Cerkan, Jul 01 2017
STATUS
approved