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%I #8 May 11 2023 18:19:24
%S 30,15,105,210,2310,5005,1616615,9699690,223092870,111546435,
%T 2156564410,100280245065,3710369067405,7420738134810,6541380665835015
%N Denominator of Sum_{k=1..n} mu(k)/k when it changes sign.
%o (PARI) t = 0; v = []; for( n = 1, 80, t1 = t; t = t + moebius( n) / n; if( t * t1 < 0, v = concat( v, denominator( t)), )); v
%Y Cf. A070890, A070888, A070889.
%K nonn,frac
%O 1,1
%A _Donald S. McDonald_, May 17 2002
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