A043754 Let L(n) = n-th lucky number. Then a(1)=0; a(n) is largest number m such that all divisors of L(n)^m are lucky numbers.

0, 2, 2, 1, 2, 0, 1, 0, 3, 0, 4, 1, 1, 0, 1, 1, 0, 1, 0, 1, 0, 1, 0, 0, 1, 0, 1, 1, 0, 0, 0, 1, 0, 1, 1, 0, 0, 1, 0, 1, 0, 1, 1, 1, 0, 0, 1, 1, 1, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 1, 0, 2, 0, 0, 1, 0, 0, 0, 0, 2, 0, 1, 0, 0, 1, 0, 1, 0, 0, 0, 1, 1, 0, 1, 0, 0

Offset

1,2

Links

Table of n, a(n) for n=1..88.

Example

To get a(3) we compute L(3)=7, divisors of 7^2 are 1, 7, 49. They are lucky numbers but 7^3 is not, so a(3)=2.

Crossrefs

Cf. A000959.

Sequence in context: A300481 A368509 A074942 * A144191 A288007 A145783

Adjacent sequences: A043751 A043752 A043753 * A043755 A043756 A043757

Keyword

nonn

Author

Naohiro Nomoto, Oct 08 2000

Extensions

More terms from Sascha Kurz, Oct 14 2001

Offset changed to 1 and more terms from Jinyuan Wang, Sep 05 2020

Status

approved