`Pochhammer`¶

Returns the Pochhammer symbol (rising factorial).

$ wo 'Pochhammer[3, 0]'
1

It threads over either argument.

$ wo 'Pochhammer[3, {1, 2}]'
{3, 12}

A non-integer rational second argument reduces to the closed form Gamma[a + b]/Gamma[a].

$ wo 'Pochhammer[2, 1/2]'
(3*Sqrt[Pi])/4

Pochhammer¶