%I
%S 0,75,9750,997500,99975000,9999750000,999997500000,99999975000000,
%T 9999999750000000,999999997500000000,99999999975000000000,
%U 9999999999750000000000,999999999997500000000000,99999999999975000000000000,9999999999999750000000000000
%N a(n) is the largest number such that all of a(n)'s lengthn substrings are distinct and divisible by 75.
%H Hans Havermann, <a href="/A093211/a093211.txt">Table of A093211A093299</a>
%e a(4) is 997500 because its length4 substrings (9975, 9750, 7500) are all distinct and divisible by 75 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
%E a(9)a(15) from _John Cerkan_, Jan 05 2018
