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A069046 Denominator(sum(i=1,n,1/i^4))/denominator(sum(i=1,n,1/i^2)). 0

%I

%S 1,4,36,144,3600,3600,176400,705600,6350400,31752000,3841992000,

%T 3841992000,649296648000,649296648000,129859329600,519437318400,

%U 150117385017600,150117385017600,54192375991353600,270961879956768000

%N Denominator(sum(i=1,n,1/i^4))/denominator(sum(i=1,n,1/i^2)).

%K easy,nonn

%O 1,2

%A _Benoit Cloitre_, Apr 03 2002

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Last modified September 26 05:07 EDT 2021. Contains 347664 sequences. (Running on oeis4.)