Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).
%I #2 Mar 31 2012 13:20:14
%S 1,2,2,24,40,144,5040,40320,6048,6048,19958400,53222400,53222400,
%T 87178291200,118879488000,5230697472000,8083805184000,
%U 3201186852864000,40548366802944000,2432902008176640000,17030314057236480000
%N Denominators of n-th approximation of factorial (also called harmonic) expansion of Euler's constant C, called gamma= 0.5772156649...
%C For the Havil reference and a W. Lang link see A131447.
%F a(n)=denominator(r(n)), with r(n):=sum(b(k)/k!,n=1..n) with b(k):= A096622(k) (factorial expansion of gamma).
%e Rationals r(n): [0, 1/2, 1/2, 13/24, 23/40, 83/144, 2909/5040, 23273/40320, 3491/6048, ...]
%K nonn,frac,easy
%O 1,2
%A _Wolfdieter Lang_ Aug 07 2007