A228427 Denominator of Sum(i=1..n-1, 1/i^(2*n-1)).

1, 1, 32, 279936, 5159780352, 36279705600000000000, 43535646720000000000000, 248025792814017858404352000000000000000, 17203888069958467671501449252044800000000000000000

Offset: 1

Author

Ralf Stephan, Nov 10 2013

Keywords

• nonn
• frac

Comments

Numerators are in A228426.

Crossrefs

Cf. A001008/A002805.

Programs

PARI

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