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A093291
a(n) is the largest number such that all of a(n)'s length-n substrings are distinct and divisible by 91.
0
0, 91, 910, 90091001, 99918, 99990899990, 9999990, 1111110099999900, 999999910, 99999990091111111001, 99999999918, 99999999990899999999990, 9999999999990
OFFSET
1,2
EXAMPLE
a(4) is 90091001 because its length-4 substrings (9009, 0091, 0910, 9100, 1001) are all distinct and divisible by 91 and there is no larger number with this property.
CROSSREFS
Cf. A093211, A093212, ..., A093299.
Sequence in context: A072393 A085952 A129255 * A254519 A185375 A036526
KEYWORD
base,nonn
AUTHOR
Hans Havermann, Mar 29 2004
EXTENSIONS
a(11)-a(13) from John Cerkan, Jul 01 2017
STATUS
approved