A171626 Ceiling(n-th noncomposite/n).
1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 5, 4, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5
Offset: 1
Keywords
Formula
a(n) = A171622(n) + 1 for n >= 4.
Extensions
Corrected by Jaroslav Krizek, Dec 16 2009
Comments