The invborel(expr, a(n)) command computes the inverse Borel transform of a generating function.

If  is the sequence of numbers defined by the recurrence expr, the invborel function computes the recurrence for the numbers .

If t is specified as 'diffeq', expr is considered a linear differential equation with polynomial coefficients.  The function returns a linear differential equation satisfied by its inverse Borel transform.

Laplace can be used as a synonym of invborel, that is, the Laplace(expr, a(n)) command can be used instead.