login
A091373
Number of numbers <= n having exactly as many prime factors as the value of their smallest prime factor.
4
0, 0, 0, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4, 5, 5, 5, 5, 6, 7, 7, 7, 7, 7, 7, 7, 8, 8, 8, 8, 9, 9, 9, 9, 9, 9, 9, 10, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 12, 12, 12, 12, 13, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 15, 16, 16, 16, 16, 16, 16, 16, 17, 17
OFFSET
1,6
COMMENTS
a(n) = #{m: A001222(m)=A020639(m), m<=n};
A091372(n) + a(n) + A091374(n) = n.
CROSSREFS
Sequence in context: A055679 A056172 A285881 * A197637 A235492 A226762
KEYWORD
nonn
AUTHOR
Reinhard Zumkeller, Jan 04 2004
STATUS
approved