|
%I #8 Jun 06 2016 22:23:03
%S 1,20,1600,6400,409600,204800000,16384000000,327680000000,
%T 83886080000000,67108864000000,671088640000000000,
%U 13421772800000000000,4294967296000000000000,17179869184000000000000
%N Denominators of partial sums of a series for the inverse of the arithmetic-geometric mean (agM) of 2/sqrt(5) and 1.
%C See the references and the W. Lang link under A130039.
%F a(n) = denom(sum((((2*j)!/(j!^2))^2) *((1/(5*2^4))^j),j=0..n)), n>=0.
%K nonn,frac,easy
%O 0,2
%A _Wolfdieter Lang_ Jun 01 2007
|
