#include<iostream>
#include<cstdio>
#include<cmath>
#include<algorithm> 
#include<string>
#include<cstring>
using namespace std;
int main()
{
    int t;
    cin >> t;
    while (t--) {
        int n;
        while (cin >> n) {
            int time1 = 0, arr[200] = { 0 };
            arr[0] = 1;
            for (int i = 1; i <= n; i++) {
                cin >> arr[i];
            }
            for (int i = 0; i < n; i++) {
                if (arr[i + 1] >= arr[i]) time1 = time1 + (arr[i + 1] - arr[i]) * 6 + 3;
                else time1 = time1 + (arr[i] - arr[i + 1]) * 4 + 3;
            }
            cout << time1 << endl;
        }
    }
    return 0;
}