FactorialMoment

FactorialMoment[data, r] gives the order r factorial moment of data.

FactorialMoment[dist, r] gives the factorial moment of the distribution dist.

Examples

Factorial moment of data:

FactorialMoment[{1, 2, 3, 4, 5}, 2]
(* 6 *)

Factorial moment of a distribution:

FactorialMoment[PoissonDistribution[3], 2]
(* 9 *)

Please visit the official Wolfram Language Reference for more details.