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 A336692 #9 Jul 31 2020 16:42:53 %S A336692 1,1,2,1,3,3,2,1,3,3,3,4,4,3,3,1,3,2,3,4,2,3,3,5,1,4,3,4,5,3,2,1,3,5, %T A336692 3,4,4,5,4,5,4,3,4,4,5,3,3,6,4,5,3,4,5,5,3,5,3,5,5,4,6,3,4,1,4,3,3,7, %U A336692 3,3,3,3,4,5,6,4,3,4,3,6,5,7,4,4,5,3,5,5,5,6,4,4,2,3,5,7,4,4,5,5,5,5,4,5,3 %N A336692 Binary weight of 1+sigma(n). %H A336692 Antti Karttunen, <a href="/A336692/b336692.txt">Table of n, a(n) for n = 1..65537</a> %H A336692 <a href="/index/Bi#binary">Index entries for sequences related to binary expansion of n</a> %H A336692 <a href="/index/Si#SIGMAN">Index entries for sequences related to sigma(n)</a> %F A336692 a(n) = A000120(1+A000203(n)) = A000120(A088580(n)) = A000120(A332459(n)). %o A336692 (PARI) A336692(n) = hammingweight(1+sigma(n)); %Y A336692 Cf. A000120, A000203, A088580, A175548, A324294, A332459, A336691, A336693, A336694, A336695, A336696. %K A336692 nonn %O A336692 1,3 %A A336692 _Antti Karttunen_, Jul 31 2020