Zseq (version 0.1.1)

Factorial.Alternating: 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, Rmpfr = TRUE, PrecisionBits = 496)

Arguments

n

the number of first n entries from the sequence.

Rmpfr

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

PrecisionBits

a positive integer for precision bits larger than 2.

Value

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

See Also

Factorial

Examples

# NOT RUN {
## generate first 5 Alternating Factorial numbers
first5 = Factorial.Alternating(5)

## print without trailing 0's.
print(first5, drop0trailing = TRUE)

# }