SeriesData

SeriesData(x, x0, {coeff0, coeff1, coeff2,...}, nMin, nMax, denominator)

internal structure of a power series at the point x = x0 the coeff_i are coefficients of the power series.

See:

>> SeriesData(x, 0,{1,0,-1/6,0,1/120,0,-1/5040,0,1/362880}, 1, 11, 2)
Sqrt(x)-x^(3/2)/6+x^(5/2)/120-x^(7/2)/5040+x^(9/2)/362880+O(x)^(11/2)