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a(n) is the largest number such that all of a(n)'s length-n substrings are distinct and divisible by 27.
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%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