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A345047 a(n) = A003958(n) / A345046(n), where A003958(n) is multiplicative with a(p^e) = (p-1)^e, and A345046(n) gives the least common multiple of the same factors. 4

%I #8 May 12 2024 15:35:35

%S 1,1,1,1,1,1,1,1,1,1,1,1,1,1,2,1,1,1,1,1,2,1,1,1,1,1,1,1,1,2,1,1,2,1,

%T 2,1,1,1,2,1,1,2,1,1,4,1,1,1,1,1,2,1,1,1,2,1,2,1,1,2,1,1,2,1,4,2,1,1,

%U 2,2,1,1,1,1,2,1,2,2,1,1,1,1,1,2,4,1,2,1,1,4,6,1,2,1,2,1,1,1,2,1,1,2,1,1,4

%N a(n) = A003958(n) / A345046(n), where A003958(n) is multiplicative with a(p^e) = (p-1)^e, and A345046(n) gives the least common multiple of the same factors.

%H Antti Karttunen, <a href="/A345047/b345047.txt">Table of n, a(n) for n = 1..65537</a>

%F a(n) = A003958(n) / A345046(n).

%o (PARI) A345047(n) = { my(f=factor(n)~, g=vector(#f, i, (f[1, i]-1)^f[2, i])); factorback(g)/lcm(g); };

%Y Cf. A003958, A345046.

%Y Cf. also A345045, A353784.

%K nonn

%O 1,15

%A _Antti Karttunen_, Jun 07 2021

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Last modified September 2 01:10 EDT 2024. Contains 375600 sequences. (Running on oeis4.)