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A093251
a(n) is the largest number such that all of a(n)'s length-n substrings are distinct and divisible by 51.
0
0, 51, 5612, 11224488, 9990933303, 666060333030, 77777551111188, 99999984, 888888180555555750, 33333030336666606066, 7777777730744444444904, 888888888084222222222021, 22222202002025555550500505, 99999999999975, 999999999990009666666666660006
OFFSET
1,2
EXAMPLE
a(4) is 11224488 because its length-4 substrings (1122, 1224, 2244, 2448, 4488) are all distinct and divisible by 51 and there is no larger number with this property.
CROSSREFS
Cf. A093211, A093212, ..., A093299.
Sequence in context: A015271 A221116 A099397 * A184282 A232278 A208350
KEYWORD
base,nonn
AUTHOR
Hans Havermann, Mar 29 2004
EXTENSIONS
a(11)-a(15) from John Cerkan, Jan 08 2018
STATUS
approved