A112897 a(n) is the least positive integer in base 10 containing n fours that is divisible by n.

4, 44, 444, 4444, 444440, 444444, 14444444, 444444144, 444444444, 44444444440, 444444444444, 444444444444, 44444244444444, 434444444444444, 4444444444444440, 44444444444444144, 344444444444444444

Offset

1,1

Links

Table of n, a(n) for n=1..17.

Formula

a(n) = n*A112898(n).

Example

a(7) = 14444444 because 14444444 contains 7 fours and is divisible by 7.

Crossrefs

Cf. A112889-A112898, A112900-A112905, A112907-A112910.

Sequence in context: A221405 A105038 A002278 * A163013 A087813 A342346

Adjacent sequences: A112894 A112895 A112896 * A112898 A112899 A112900

Keyword

base,nonn

Author

Ray G. Opao, Oct 05 2005

Extensions

Extended by Ray Chandler, Oct 09 2005

Status

approved