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Denominator of Sum(i=1..n-1, 1/i^(2*n-1)).
1

%I #9 Nov 10 2013 03:47:28

%S 1,1,32,279936,5159780352,36279705600000000000,

%T 43535646720000000000000,248025792814017858404352000000000000000,

%U 17203888069958467671501449252044800000000000000000

%N Denominator of Sum(i=1..n-1, 1/i^(2*n-1)).

%C Numerators are in A228426.

%o (PARI) a(n)=denominator(sum(i=1,n-1,1/i^(2*n-1)))

%Y Cf. A001008/A002805.

%K nonn,frac

%O 1,3

%A _Ralf Stephan_, Nov 10 2013