Implementation of the Ackermann formula as discussed on ComputerPhile (https://www.youtube.com/watch?v=i7sm9dzFtEI).

Ackermann

public class AckermannFormula
{
    public static long Ackermann(long m, long n)
    {
        if (m == 0) return (n+1);
        else if (n == 0) Ackermann(m-1, 1);
        else return Ackermann(m-1, Ackermann(m, n-1));
    }
}