A093228 a(n) is the largest number such that all of a(n)'s length-n substrings are distinct and divisible by 28.

0, 284, 336448, 977280084004, 73500084000, 888748888048888, 7777756000008400000, 7777977200004004000080080000, 777777336000000448000000, 777777977200000080080000004004000000, 77777773500000000084000000000, 888888888748888888888048888888888

Offset

1,2

Links

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

Hans Havermann, Table of A093211-A093299

Example

a(3) is 336448 because its length-3 substrings (336, 364, 644, 448) are all distinct and divisible by 28 and there is no larger number with this property.

Crossrefs

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

Sequence in context: A285892 A049024 A277771 * A339681 A249954 A043415

Adjacent sequences: A093225 A093226 A093227 * A093229 A093230 A093231

Keyword

base,nonn

Author

Hans Havermann, Mar 28 2004

Extensions

a(11)-a(12) from John Cerkan, Jul 30 2017

Status

approved