Catalan {Zseq}

Catalan numbers

Description

Under OEIS A000108, the nth Catalan number is given as

C_n = \frac{(2n)!}{(n+1)!n!}

where the first 6 entries are 1, 1, 2, 5, 14, 42 with n\ge 0.

Usage

Catalan(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.

Examples

## generate first 30 Catalan numbers
print(Catalan(30))