%I #16 Sep 30 2018 20:25:36

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

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

%U 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1

%N Denominator of -A023900(n)/2.

%C Also denominator of A173557(n)/2. a(n) = 2 iff n is a power of 2, 1 otherwise. - _Antti Karttunen_, Sep 30 2018

%H Antti Karttunen, <a href="/A297382/b297382.txt">Table of n, a(n) for n = 1..65537</a>

%F a(n) = denominator of -A023900(n)/2.

%F a(n) = 1 + A209229(n). - _Antti Karttunen_, Sep 30 2018

%t Clear[n, s, nn]; nn = 64; Denominator[Table[Limit[Zeta[s]*Total[MoebiusMu[Divisors[n]]/Divisors[n]^(s - 1)], s -> 0], {n, 1, nn}]]

%o (PARI) A297382(n) = denominator(-(1/2)*factorback(apply(p -> 1-p, factor(n)[, 1]))); \\ _Antti Karttunen_, Sep 30 2018

%Y Cf. A297381 (numerators).

%Y Cf. A023900, A173557.

%Y One more than A209229.

%K nonn,frac

%O 1,1

%A _Mats Granvik_, Dec 29 2017

%E More terms from _Antti Karttunen_, Sep 30 2018