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 A090455 #12 Apr 24 2022 02:31:20
%S A090455 0,-1,0,-2,-1,-1,1,-2,-2,-2,-2,-1,0,-1,-1,-3,-3,-3,0,-2,0,-2,0,-2,0,
%T A090455 -1,-1,-2,-1,0,-2,-2,-1,-2,-1,-3,-2,-1,-1,-3,-2,-2,-3,0,0,-1,0,-5,-2,
%U A090455 -2,-1,-4,-1,-3,3,-1,0,-1,1,0,0,1,1,-5,-3,-4,-2,-2,-3,-3,0,-4,-4,-3
%N A090455 Difference between numbers of binary 1's of n and binary 1's of n-th prime.
%H A090455 Amiram Eldar, <a href="/A090455/b090455.txt">Table of n, a(n) for n = 1..10000</a>
%F A090455 a(n) = A000120(n) - A014499(n);
%F A090455 a(A071600(n)) = a(A049084(A072439(n))) = 0.
%F A090455 a(A049084(A090456(n))) < 0.
%F A090455 a(A049084(A090457(n))) > 0.
%t A090455 Table[DigitCount[n,2,1]-DigitCount[Prime[n],2,1],{n,80}] (* _Harvey P. Dale_, Aug 08 2013 *)
%Y A090455 Cf. A000120, A014499.
%Y A090455 Cf. A007088, A004676, A090431.
%Y A090455 Cf. A049084, A071600, A090456, A090457.
%K A090455 sign,base
%O A090455 1,4
%A A090455 _Reinhard Zumkeller_, Dec 01 2003
%E A090455 Definition clarified by _Harvey P. Dale_, Aug 08 2013