AlternatingFactorial

AlternatingFactorial[n] gives the alternating factorial af(n).

Examples

Compute the alternating factorial:

AlternatingFactorial[5]
(* 101 *)

The alternating factorial is defined as the sum of alternating factorials:

Table[AlternatingFactorial[n], {n, 1, 6}]
(* {1, 1, 5, 19, 101, 619} *)

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