3.000000000	(2/3)^k
3160.817621887	k^-0.5
0.999999600	1/k(k+1)
30.314541510	Flint Hills
42.995233998	Cookson Hills
15.309017155	Harmonic
1.644933667	Riemann Zeta
0.693146981	Alternating Harmonic
0.785398063	Gregory