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 A352884 #11 Apr 07 2022 10:39:42
%S A352884 1,1,1,2,1,2,2,1,2,2,2,2,2,3,1,3,2,2,2,3,2,3,2,3,2,3,2,4,1,3,3,2,3,3,
%T A352884 2,3,3,2,4,2,4,2,3,3,3,3,2,4,3,1,4,3,2,4,3,2,4,3,2,3,3,3,3,3,3,3,3,3,
%U A352884 4,2,4,3,3,4,2,5,2,4,2,4,3,3,4,3,4,3,3,4,3,4,3,4,3,4,3,3,4,3,3,4,3,5,1,5,3
%N A352884 Binary weight of A109812(n).
%C A352884 Equivalently, binary weight of A352575.
%H A352884 Antti Karttunen, <a href="/A352884/b352884.txt">Table of n, a(n) for n = 1..100000</a>
%H A352884 <a href="/index/Bi#binary">Index entries for sequences related to binary expansion of n</a>
%F A352884 a(n) = A000120(A109812(n)) = A000120(A351965(n)).
%o A352884 (PARI)
%o A352884 v109812 = readvec("b109812_to10e5.txt"); \\ Prepared from b-file data with gawk ' { print $2 } '
%o A352884 up_to = #v109812;
%o A352884 A109812(n) = v109812[n];
%o A352884 A352884(n) = hammingweight(A109812(n));
%Y A352884 Cf. A000120, A109812, A351963, A351964, A351965, A352889.
%Y A352884 Cf. also A253589, A352791, A352574, A352575, A352576.
%K A352884 nonn,base
%O A352884 1,4
%A A352884 _Antti Karttunen_, Apr 07 2022