sequence

let [K, N] = gets().split(' ').map(Number);

let sec = [K];

for(let i = 1; i < N; i++){
    let curr = sec[i - 1];
    sec.push(curr + 1);
    sec.push(2 * curr + 1);
    sec.push(curr + 2);
}
console.log(sec[N-1]);