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A093254
a(n) is the largest number such that all of a(n)'s length-n substrings are distinct and divisible by 54.
0
0, 54, 86486, 669666, 66690666, 88884088884, 666667866666, 66666672666666, 88888860088888860, 6666666660666666666, 666666666006666666660, 88888888884688888888884, 6666666660000666666666000, 666666666000006666666660000, 88888888888882288888888888882
OFFSET
1,2
EXAMPLE
a(3) is 86486 because its length-3 substrings (864, 648, 486) are all distinct and divisible by 54 and there is no larger number with this property.
CROSSREFS
Cf. A093211, A093212, ..., A093299.
Sequence in context: A085482 A084226 A071800 * A347061 A151635 A363458
KEYWORD
base,nonn
AUTHOR
Hans Havermann, Mar 29 2004
EXTENSIONS
a(11)-a(15) from John Cerkan, Jan 08 2018
STATUS
approved