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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 50.
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%I #5 Mar 30 2012 18:39:52

%S 0,500,95000,9950000,999500000,99995000000,9999950000000,

%T 999999500000000

%N a(n) is the largest number such that all of a(n)'s length-n substrings are distinct and divisible by 50.

%H Hans Havermann, <a href="/A093211/a093211.txt">Table of A093211-A093299</a>

%e a(3) is 95000 because its length-3 substrings (950, 500, 000) are all distinct and divisible by 50 and there is no larger number with this property

%Y Cf. A093211, A093212, ..., A093299.

%K base,nonn

%O 1,2

%A _Hans Havermann_, Mar 29 2004