A093215 a(n) is the largest number such that all of a(n)'s length-n substrings are distinct and divisible by 15.

0, 900, 99000, 9885055505, 9988500555005, 9998850005550005, 9999885000055500005, 9999988500000555000005, 9999998850000005550000005, 9999999885000000055500000005, 9999999988500000000555000000005, 9999999998850000000005550000000005

Offset

1,2

Links

Table of n, a(n) for n=1..12.

Hans Havermann, Table of A093211-A093299

Example

a(3) is 99000 because its length-3 substrings (990, 900, 000) are all distinct and divisible by 15 and there is no larger number with this property.

Crossrefs

Cf. A093211, A093212, ..., A093299.

Sequence in context: A093230 A093798 A093218 * A252674 A158407 A250782

Adjacent sequences: A093212 A093213 A093214 * A093216 A093217 A093218

Keyword

base,nonn

Author

Hans Havermann, Mar 28 2004

Extensions

a(8)-a(11) from John Cerkan, May 22 2017

a(12) from John Cerkan, Jan 09 2018

Status

approved