A106558 a(n)=1+floor(sqrt(Pi/2)*p(n)#).

3, 8, 38, 264, 2896, 37638, 639830, 12156759, 279605448, 8108557990, 251365297667, 9300516013674

Offset

1,1

Comments

a(n) is an approximation to the number of primes less than p(n+1)#

Links

Table of n, a(n) for n=1..12.

Crossrefs

Cf. A000849.

Sequence in context: A264657 A190658 A366629 * A065914 A288759 A180368

Adjacent sequences: A106555 A106556 A106557 * A106559 A106560 A106561

Keyword

nonn

Author

Pierre CAMI, May 09 2005

Status

approved