Function dahl_bellnumber::bell

pub fn bell(n: usize) -> BigUint

Compute the Bell number.

Examples

let answer = dahl_bellnumber::bell(5);

use std::convert::TryFrom;
use num_traits::cast::ToPrimitive;

assert_eq!(answer, num_bigint::BigUint::try_from(52_u32).unwrap());
assert_eq!(answer.to_f64().unwrap(), 52.0);