#include <bits/stdc++.h>

using namespace std;

const int maxn = 1e5 + 1;
int a[maxn];

int main(){
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
    ifstream in("split.in");
    ofstream out("split.out");
    int n;
    in >> n;
    for(int i = 0;i < n;i++){
        in >> a[i];
    }
    long long h = 0;
    for(int i = 0;i < n;i++){
        int maxj = i;
        for(int j = i + 1;j < n;j++){
            int q = i, u = j;
            while(q < n && u > -1 && q < u && a[q] == a[u]){
                q++;
                u--;
            }
            if(q >= u){
                maxj = j;
            }
        }
        h = h + (maxj - i + 1) * (maxj - i + 1);
        i = maxj;
    }
    out << h << endl;
    return 0;
}