A195860 Minimal positive integer k such that n^k is not divisible by the sum of its decimal digits; or 0 if no such integer exists.

0, 4, 6, 2, 2, 11, 2, 2, 3, 0, 1, 6, 1, 1, 1, 1, 1, 5, 1, 4, 3, 1, 1, 7, 1, 1, 2, 1, 1, 25, 1, 1, 1, 1, 1, 6, 1, 1, 1, 2, 1, 6, 1, 1, 3, 1, 1, 5, 1, 2, 1, 1, 1, 7, 1, 1, 1, 1, 1, 15, 1, 1, 3, 1, 1, 1, 1, 1, 1, 2, 1, 4, 1, 1, 1, 1, 1, 1, 1, 4, 2, 1, 1, 4, 1, 1, 1, 1, 1, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0

Offset

1,2

Links

Table of n, a(n) for n=1..100.

Formula

a(n) = minimal positive integer k such that n^k does not belong to A005349.

For m>=0, a(10^m) = 0.

Crossrefs

Cf. A135186, A135187, A135188, A135189, A135190, A135191, A135192, A135193, A135194, A135195, A135196, A135197, A135198, A135199, A135200, A135201, A135202.

Sequence in context: A214549 A154892 A286155 * A106143 A359283 A255524

Adjacent sequences: A195857 A195858 A195859 * A195861 A195862 A195863

Keyword

nonn,base

Author

Max Alekseyev, Sep 24 2011

Status

approved