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Number of primes <= A214756(n).
4

%I #19 Nov 13 2013 17:10:48

%S 1,1,1,7,20,28,96,152,185,212,1179,1829,2217,3382,14350,30780,31528,

%T 40929,103498,104047,149674,325845,1094396,1319933,2850163,6957867,

%U 10539421,10655453

%N Number of primes <= A214756(n).

%C a(n) = pi(A214756(n)).

%F a(n) = A000217(A214756(n))

%e A214756(5) = 71, so a(5) = primepi(A214756(5)) = primepi(71) = 20.

%Y Cf. A000101, A104272, A214756, A001223.

%Y Cf. A002386, A214925, A214926, A214757.

%K nonn

%O 1,4

%A _John W. Nicholson_, Jul 29 2012

%E Extension to a(28) added by _John W. Nicholson_, Nov 11 2013