1,1

a(n) = Min{m: n <= #{x composite: m<=x<=2*m}}.

Table of n, a(n) for n=1..72.

Cf. A059316, A002808.

Sequence in context: A003965 A351988 A214964 * A318122 A265568 A265552

Adjacent sequences: A097499 A097500 A097501 * A097503 A097504 A097505

nonn

Reinhard Zumkeller, Aug 25 2004

approved