BigInteger[] last = new[] { BigInteger.One },
                  now = new[] { BigInteger.One, BigInteger.One },
                  next;

            for (int row = 3; row < 202; row++)
            {
                next = new BigInteger[row];
                next[0] = next[row - 1] = 1;
                for (int col = 1; col < row - 1; col++) next[col] = now[col - 1] + now[col] + last[col - 1];
                last = now;
                now = next;
            }

            Console.WriteLine(now[100]);
            Console.ReadLine();