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A366885 Dedekind psi function applied to the odd part of n, permuted by A163511: a(n) = A347385(A163511(n)). 3

%I #7 Nov 04 2023 14:00:33

%S 1,1,1,4,1,12,4,6,1,36,12,30,4,24,6,8,1,108,36,150,12,120,30,56,4,72,

%T 24,48,6,32,8,12,1,324,108,750,36,600,150,392,12,360,120,336,30,224,

%U 56,132,4,216,72,240,24,192,48,96,6,96,32,72,8,48,12,14,1,972,324,3750,108,3000,750,2744,36,1800,600,2352

%N Dedekind psi function applied to the odd part of n, permuted by A163511: a(n) = A347385(A163511(n)).

%H Antti Karttunen, <a href="/A366885/b366885.txt">Table of n, a(n) for n = 0..16384</a>

%o (PARI)

%o A163511(n) = if(!n, 1, my(p=2, t=1); while(n>1, if(!(n%2), (t*=p), p=nextprime(1+p)); n >>= 1); (t*p));

%o A347385(n) = if(1==n,n, my(f=factor(n>>valuation(n, 2))); prod(i=1, #f~, f[i, 1]^f[i, 2] + f[i, 1]^(f[i, 2]-1)));

%o A366885(n) = A347385(A163511(n));

%Y Cf. A001615, A163511, A347385, A366886 (rgs-transform).

%Y Cf. also A324186.

%K nonn

%O 0,4

%A _Antti Karttunen_, Nov 04 2023

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Last modified July 17 10:30 EDT 2024. Contains 374375 sequences. (Running on oeis4.)