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 A342465 #5 Mar 17 2021 17:59:37 %S A342465 0,0,0,0,0,0,0,0,2,1,0,0,0,0,0,0,1,1,1,2,0,1,0,0,0,2,1,0,0,1,0,0,0,2, %T A342465 0,3,1,0,0,3,2,0,1,2,1,1,0,0,3,4,1,2,2,0,1,0,1,3,0,2,0,0,2,0,2,1,2,0, %U A342465 0,1,1,4,3,3,0,2,0,2,1,4,3,0,2,0,2,1,0,3,3,4,0,2,0,1,0,0,2,4,1,4,2,2,2,3,0 %N A342465 a(n) = A329697(A337194(n)). %H A342465 <a href="/index/Si#SIGMAN">Index entries for sequences related to sigma(n)</a> %F A342465 a(n) = A329697(A336698(n)) = A329697(A337194(n)). %o A342465 (PARI) %o A342465 A000265(n) = (n>>valuation(n,2)); %o A342465 A329697(n) = if(!bitand(n,n-1),0,1+A329697(n-(n/vecmax(factor(n)[, 1])))); %o A342465 A337194(n) = (1+A000265(sigma(n))); %o A342465 A342465(n) = A329697(A336698(n)); %Y A342465 Cf. A000203, A000265, A329697, A337194, A342466. %Y A342465 Cf. also A336694, A336928. %K A342465 nonn %O A342465 1,9 %A A342465 _Antti Karttunen_, Mar 16 2021