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A093272
a(n) is the largest number such that all of a(n)'s length-n substrings are distinct and divisible by 72.
0
0, 72, 9360, 993600, 889928800, 98899208800, 9988992008800, 999889920008800, 99998899200008800, 88888898888888880888888888, 98888889888088888808880888888, 99888888988800888888088800888888, 99988888898880008888880888000888888
OFFSET
1,2
EXAMPLE
a(4) is 993600 because its length-4 substrings (9936, 9360, 3600) are all distinct and divisible by 72 and there is no larger number with this property.
CROSSREFS
Cf. A093211, A093212, ..., A093299.
Sequence in context: A283093 A178635 A271189 * A105347 A093236 A146500
KEYWORD
base,nonn
AUTHOR
Hans Havermann, Mar 29 2004
EXTENSIONS
a(11)-a(13) from John Cerkan, Jan 08 2018
STATUS
approved