#include <algorithm>
#include <climits>
#include <cmath>
#include <cstdio>
#include <cstdlib>
#include <ctime>
#include <iostream>
#include <sstream>
#include <functional>
#include <map>
#include <string>
#include <cstring>
#include <vector>
#include <queue>
#include <stack>
#include <deque>
#include <set>
#include <list>
#include <numeric>
using namespace std;
const double PI = 3.14159265358979323846;
const double EPS = 1e-12;
const int INF = 1<<25;
typedef pair<int,int> P;
typedef long long ll;
typedef unsigned long long ull;
#define M 110
ll T, N, A[M], dp[M][M], dp2[M][M];

ll solve(){
	memset(dp, -1, sizeof(dp));
	memset(dp2, -1, sizeof(dp2));
	for(int i = 0; i < N; i++){
		for(int j = i; j < N; j++){
			if(i==j) dp[i][j] = dp2[i][j] = 0;
			if(A[i]<A[j]) dp[i][j] = 1;
			if(A[i]>A[j]) dp2[i][j] = 1;
		}
	}
	for(int j = 0; j < N; j++){
		for(int i = 0; i < j; i++){
			for(int k = j+1; k < N; k++){
				if(dp[i][j]>0 && A[j]-A[i]<A[k]-A[j]){
					dp[j][k] = max(dp[j][k], dp[i][j]+1);
				}
			}
		}
	}
	for(int j = N-1; j >= 0; j--){
		for(int i = 0; i < j; i++){
			for(int k = j+1; k < N; k++){
				if(dp2[j][k]>0 && A[i]-A[j]>A[j]-A[k]){
					dp2[i][j] = max(dp2[i][j], dp2[j][k]+1);
				}
			}
		}
	}

	for(int i = 0; i < N; i++){
		for(int j = 0; j < N; j++){
			if(dp[i][j]<0) dp[i][j] = -INF;
			if(dp2[i][j]<0) dp2[i][j] = -INF;
		}
	}
	ll res = 1;
	for(int i = 0; i < N; i++)
		for(int j = i; j < N; j++)
			for(int k = j; k < N; k++)
				res = max(res, dp[i][j]+dp2[j][k]+1);
	return res;
}

int main(){
	cin>>T;
	while(T--){
		cin>>N;
		for(int i = 0; i < N; i++) cin>>A[i];
		A[N] = 1e10;
		cout<<solve()<<endl;
	}
	return 0;
}