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 A127255 #6 Aug 04 2023 04:35:46
%S A127255 1,0,1,2,1,2,3,2,3,4,5,4,5,4,5,6,5,6,7,6,7,6,7,8,9,8,9,10,9,10,11,10,
%T A127255 11,12,13,12,13,12,13,14,15,14,15,16,15,16,17,16,17,16,17,18,17,18,19,
%U A127255 18,19,20,21,20,21,20,21,22,21,22,23,22,23,22,23,24,25
%N A127255 Partial sums of A127252.
%t A127255 Accumulate[Table[If[EvenQ[IntegerExponent[n, 2]] && OddQ[DigitCount[n, 2, 1]], -1, 1], {n, 0, 100}]] (* _Amiram Eldar_, Aug 04 2023 *)
%Y A127255 Cf. A127252.
%K A127255 nonn,base
%O A127255 0,4
%A A127255 _Paul Barry_, Jan 10 2007
%E A127255 More terms from _Amiram Eldar_, Aug 04 2023