A069585 a(n) = n - largest prime power <= n.

0, 0, 0, 1, 2, 3, 0, 0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5, 6, 7, 8, 0, 1, 0, 1, 2, 3, 4, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14

Offset

2,5

Comments

Begins with 3 consecutive zeros. Also a(8)=a(9)=0. Question: are there any more occurrence of 2 or more consecutive zeros?

Links

Table of n, a(n) for n=2..94.

Crossrefs

Cf. A069584.

Sequence in context: A261430 A024466 A021817 * A167613 A319753 A078332

Adjacent sequences: A069582 A069583 A069584 * A069586 A069587 A069588

Keyword

easy,nonn

Author

Amarnath Murthy, Mar 24 2002

Status

approved