%I A106558
%S A106558 3,8,38,264,2896,37638,639830,12156759,279605448,8108557990,
%T A106558 251365297667,9300516013674
%N A106558 a(n)=1+floor(sqrt(Pi/2)*p(n)#).
%C A106558 a(n) is an approximation to the number of primes less than p(n+1)#
%Y A106558 Cf. A000849.
%Y A106558 Sequence in context: A123985 A089066 A099030 this_sequence A065914 A108262 
               A034892
%Y A106558 Adjacent sequences: A106555 A106556 A106557 this_sequence A106559 A106560 
               A106561
%K A106558 nonn
%O A106558 1,1
%A A106558 Pierre CAMI (pierrecami(AT)tele2.fr), May 09 2005