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 A255573 #8 May 14 2015 15:57:55
%S A255573 0,1,1,1,2,2,3,3,4,5,6,6,7,7,8,9,10,10,11,11,12,13,14,14,15,15,16,17,
%T A255573 18,18,19,19,20,21,22,23,24,24,25,26,27,27,28,28,29,30,31,31,32,33,34,
%U A255573 35,36,36,37,37,38,39,40,40,41,41,42,43,44,45,46,46,47,47,48,48,49,49,50,51,52,52
%N A255573 a(n) = Number of terms of A205783 (including 1) in range 0 .. n.
%H A255573 Antti Karttunen, <a href="/A255573/b255573.txt">Table of n, a(n) for n = 0..8192</a>
%F A255573 a(n) = n - A255574(n).
%F A255573 Other identities and observations. For all n >= 1:
%F A255573 a(n) = 1 + A255572(n).
%F A255573 a(n) <= A062298(n).
%o A255573 (PARI)
%o A255573 A255573_write_bfile(up_to_n) = { my(n,a_n=0); for(n=0, up_to_n, if(((n > 0) && !polisirreducible(Pol(binary(n)))),a_n++); write("b255573.txt", n, " ", a_n)); };
%o A255573 A255573_write_bfile(8192);
%Y A255573 Essentially one more than A255572 (after the initial zero).
%Y A255573 Cf. A062298, A205783, A255574.
%K A255573 nonn
%O A255573 0,5
%A A255573 _Antti Karttunen_, May 14 2015