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 A182564 #10 Feb 12 2022 13:44:48
%S A182564 0,0,0,0,1,2,4,5,8,11,16,23,34,50,74,111,166,250,376,574,871,1329,
%T A182564 2033,3120,4794,7396,11425,17688,27426,42612,66317,103298,161207,
%U A182564 251757,393790,616645,966507,1516410,2381429,3743010,5888201,9269519,14604028,23023555,36322186,57337078,90565070,143130478
%N A182564 Number of primes < Fibonacci(n).
%e A182564 Fibonacci(7)=13, there are 5 primes less than 13, so a(7)=5.
%t A182564 Table[If[PrimeQ[Fibonacci[n]],PrimePi[Fibonacci[n]-1],PrimePi[ Fibonacci[ n]]],{n,0,50}] (* _Harvey P. Dale_, Feb 12 2022 *)
%o A182564 (PARI) a(n) = primepi(fibonacci(n)-1) \\ _Michel Marcus_, May 13 2013
%Y A182564 Cf. A000040, A000045, A006880, A007053, A028505, A038107, A040014.
%K A182564 nonn
%O A182564 0,6
%A A182564 _Alex Ratushnyak_, May 05 2012