%I #5 Mar 30 2012 18:39:52
%S 0,81,97297,9990999,999009990,99997299997,9999990999999,
%T 999999009999990
%N a(n) is the largest number such that all of a(n)'s length-n substrings are distinct and divisible by 27.
%H Hans Havermann, <a href="/A093211/a093211.txt">Table of A093211-A093299</a>
%e a(3) is 97297 because its length-3 substrings (972, 729, 297) are all distinct and divisible by 27 and there is no larger number with this property
%Y Cf. A093211, A093212, ..., A093299.
%K base,nonn
%O 1,2
%A _Hans Havermann_, Mar 28 2004