>>> SerieMoyennes(20,1000,8)
[4.468, 4.526, 4.365, 4.605, 4.512, 4.536, 4.538, 4.534, 4.547, 4.462, 4.418, 4.493, 4.534, 4.509, 4.466, 4.493, 4.523, 4.457, 4.324, 4.338]