This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A065313 #20 Aug 05 2025 07:49:37
%S A065313 0,1,3,4,6,7,9,11,11,12,16,17,21,23,24,24,30,30,36,37,39,40,46,47,48,
%T A065313 51,53,54,61,62,68,70,72,74,76,77,86,87,91,92,99,100,110,112,114,117,
%U A065313 126,128,130,132,135,137,146,150,151,154,156,157,168,171,184,186,189
%N A065313 a(n) = pi(n*pi(n)).
%H A065313 Harry J. Smith, <a href="/A065313/b065313.txt">Table of n, a(n) for n = 1..1000</a>
%F A065313 a(n) = A000720(n*A000720(n)).
%t A065313 Table[PrimePi[w*PrimePi[w]], {w, 1, 100}]
%o A065313 (PARI) a(n) = { primepi(n*primepi(n)) } \\ _Harry J. Smith_, Oct 16 2009
%Y A065313 Cf. A000040, A000720, A128913.
%K A065313 nonn
%O A065313 1,3
%A A065313 _Labos Elemer_, Oct 29 2001