OFFSET
1,2
LINKS
Hans Havermann, Table of A093211-A093299
EXAMPLE
a(3) is 336448 because its length-3 substrings (336, 364, 644, 448) are all distinct and divisible by 28 and there is no larger number with this property.
CROSSREFS
KEYWORD
base,nonn
AUTHOR
Hans Havermann, Mar 28 2004
EXTENSIONS
a(11)-a(12) from John Cerkan, Jul 30 2017
STATUS
approved