fun main(){
    val t=readLine()!!.toInt()

    for (tests in 0..t-1) {
        val N = readLine()!!.toInt()
        val A = readLine()!!.split(' ').map { it.toInt() }

        if (N == 1) {
            println(1)
            continue
        }

        val DP = Array(N) { IntArray(N){2} }

        for (i in 0..N - 1) {
            val a = A[i]
            for (j in 0..i - 1) {
                val b = A[j]
                for (k in j + 1..i - 1) {
                    val c = A[k]

                    if (b < c && c < a && c - b < a - c) {
                        DP[k][i] = maxOf(DP[k][i], DP[j][k] + 1)
                    }

                    if (b < c && c > a) {
                        DP[k][i] = maxOf(DP[k][i], DP[j][k] + 1)
                    }

                    if (b > c && c > a && b - c > c - a) {
                        DP[k][i] = maxOf(DP[k][i], DP[j][k] + 1)
                    }

                }
            }
        }

        var ANS = 1

        for (i in 0..N - 1) {
            for (j in 0..N - 1) {
                ANS = maxOf(ANS, DP[i][j])
            }
        }

        println(ANS)
    }

}