login
Number of primes between 3^n and 4^n.
2

%I #17 Jun 11 2024 04:38:35

%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.

%H Amiram Eldar, <a href="/A076959/b076959.txt">Table of n, a(n) for n = 1..46</a>

%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