cp's OEIS Frontend

A344756 a(n) = A003415(n) / gcd(A003415(n), A069359(n)).

%I A344756 #11 Jun 30 2021 10:33:53
%S A344756 1,1,2,1,1,1,3,2,1,1,8,1,1,1,4,1,7,1,12,1,1,1,11,2,1,3,16,1,1,1,5,1,1,
%T A344756 1,2,1,1,1,17,1,1,1,24,13,1,1,14,2,9,1,28,1,9,1,23,1,1,1,46,1,1,17,6,
%U A344756 1,1,1,36,1,1,1,13,1,1,11,40,1,1,1,22,4,1,1,62,1,1,1,35,1,41,1,48,1,1,1,17,1,11,25
%N A344756 a(n) = A003415(n) / gcd(A003415(n), A069359(n)).
%H A344756 Antti Karttunen, <a href="/A344756/b344756.txt">Table of n, a(n) for n = 2..12012</a>
%H A344756 Antti Karttunen, <a href="/A344756/a344756.txt">Data supplement: n, a(n) computed for n = 2..65537</a>
%F A344756 a(n) = A003415(n) / A340070(n) = A003415(n) / gcd(A003415(n), A069359(n)).
%o A344756 (PARI)
%o A344756 A003415(n) = if(n<=1, 0, my(f=factor(n)); n*sum(i=1, #f~, f[i, 2]/f[i, 1]));
%o A344756 A069359(n) = (n*sumdiv(n, d, isprime(d)/d)); \\ From A069359
%o A344756 A344756(n) = { my(u=A003415(n)); (u/gcd(u,A069359(n))); };
%Y A344756 Cf. A003415, A005117 (for n > 1 gives the positions of ones), A069359, A340070, A344757.
%Y A344756 Cf. also A344696.
%K A344756 nonn
%O A344756 2,3
%A A344756 _Antti Karttunen_, May 28 2021