public class Euler138 {
    public static void main(String[] args) {
        int count = 12;
        long a = 17, b = 305, sum = a;
        for (int i = 2; i <= count; i++) {
            sum += b;
            long c = 18 * b - a;
            a = b;
            b = c;
        }
        System.out.println(sum);
    }
}