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%I #12 Mar 23 2015 07:56:05
%S 0,2,9,32,119,435,1573,5695,20773,76057,279850,1033937,3837070,
%T 14296494,53468768,200673056,755606952,2853697709,10807617884,
%U 41036410818,156186010430,595759180892,2277112205791,8720036044777,33451314673521,128533154571957
%N Number of primes between 3^n and 4^n.
%F a(n) = A086680(n) - A055729(n).
%o (PARI) a(n) = primepi(4^n) - primepi(3^n); \\ _Michel Marcus_, Mar 22 2015
%Y Cf. A055729, A086680.
%K nonn
%O 1,2
%A _Amarnath Murthy_, Oct 21 2002
%E More terms from _Ralf Stephan_, Oct 31 2002
%E a(14)-a(26) added by _David Baugh_, Mar 22 2015
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