Factorial.Alternating {Zseq}

Alternating Factorial numbers

Description

Under OEIS A005165, an Alternating Factorial is the absolute value of the alternating sum of the first n factorials of positive integers. First 6 such numbers are 0, 1, 1, 5, 19, 101.

Usage

Factorial.Alternating(n, gmp = TRUE)

Arguments

n

the number of first n entries from the sequence.

gmp

a logical; TRUE to use large number representation, FALSE otherwise.

Value

a vector of length n containing first entries from the sequence.

See Also

Factorial

Examples

## generate first 5 Alternating Factorial numbers
print(Factorial.Alternating(5))