#include <bits/stdc++.h>
using namespace std;
#define ull unsigned long

set<ull> pent;

void generate() {
    ull temp;
    for(ull n = 1; n <= 1000000; n++) {
        temp = n * (3 * n - 1) / 2;
        pent.insert(temp);
    }
}

int main() {
    /* Enter your code here. Read input from STDIN. Print output to STDOUT */
    generate();
    ull N, K;
    cin >> N >> K;
    for(ull n = K + 1; n <= N; n++) {
        ull diff = n * (3 * n - 1) / 2 - (n - K) * (3 * (n - K) - 1) / 2;
        ull add = n * (3 * n - 1) / 2 + (n - K) * (3 * (n - K) - 1) / 2;
        if(pent.count(diff) || pent.count(add)) {
            cout << n * (3 * n - 1) / 2 << endl;
        }
    }
    return 0;
}