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 A347955 #7 Oct 15 2021 21:37:05 %S A347955 0,1,1,5,1,8,1,17,8,11,1,32,1,14,13,49,1,44,1,47,16,20,1,100,13,23,44, %T A347955 62,1,81,1,129,22,29,19,156,1,32,25,151,1,106,1,92,86,38,1,276,18,92, %U A347955 31,107,1,206,25,202,34,47,1,301,1,50,111,321,28,156,1,137,40,151,1,460,1,59,120,152,28,181,1,423,206 %N A347955 Dirichlet convolution of A003415 (arithmetic derivative) with A003602 (Kimberling's paraphrases). %H A347955 Antti Karttunen, <a href="/A347955/b347955.txt">Table of n, a(n) for n = 1..16384</a> %F A347955 a(n) = Sum_{d|n} A003415(n/d) * A003602(d). %o A347955 (PARI) %o A347955 A003415(n) = if(n<=1, 0, my(f=factor(n)); n*sum(i=1, #f~, f[i, 2]/f[i, 1])); %o A347955 A003602(n) = (1+(n>>valuation(n,2)))/2; %o A347955 A347955(n) = sumdiv(n,d,A003415(n/d)*A003602(d)); %Y A347955 Cf. A003415, A003602. %Y A347955 Cf. also A347954, A347956. %K A347955 nonn %O A347955 1,4 %A A347955 _Antti Karttunen_, Sep 20 2021