sequence( n, start, step )See also the loop functions, which provide
similar functionality.
n (integer)start (floating point)step (floating point)n-element array,
(start, start+step, start+2*step, ... start+(n-1)*step)sequence(4, 100, 0.1) =
(100.0, 100.1, 100.2, 100.3)double[] sequence(int, double, double)