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%I #12 Jun 20 2018 01:32:32
%S 0,2,3,4,7,8,12,14,18,21,26,29,34,38,42,48,55,59,65,70,77,84,91,96,
%T 105,113,120,128,137,144,152,161,170,180,189,199,208,216,228,239,251,
%U 261,270,281,292,305,315,327,342,352,363,378,394,405,418,429,441,458,471
%N Number of primes between n and n^2.
%C a(n) = Sum_{k=n..n^2} A010051(k) = A117490(n) + A010051(n). - _Reinhard Zumkeller_, May 20 2010
%H R. Zumkeller, <a href="/A073882/b073882.txt">Table of n, a(n) for n = 1..1000</a>
%F a(n) = A038107(n) - A000720(n) + A010051(n). - _Reinhard Zumkeller_, May 20 2010
%o (PARI) a(n)=sum(k=n,n^2,isprime(k))
%K nonn
%O 1,2
%A _Amarnath Murthy_, Aug 16 2002
%E Corrected and extended by _Benoit Cloitre_, Aug 20 2002
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