// #define _GLIBCXX_DEBUG // for STL debug (optional)
#include <iostream>
#include <iomanip>
#include <cstdio>
#include <string>
#include <cstring>
#include <deque>
#include <list>
#include <queue>
#include <stack>
#include <vector>
#include <utility>
#include <algorithm>
#include <map>
#include <set>
#include <complex>
#include <cmath>
#include <limits>
#include <cfloat>
#include <climits>
#include <ctime>
#include <cassert>
#include <numeric>
#include <fstream>
#include <functional>
#include <bitset>
using namespace std;
using ll = long long int;
using int64 = long long int;
 
template<typename T> void chmax(T &a, T b) {a = max(a, b);}
template<typename T> void chmin(T &a, T b) {a = min(a, b);}
template<typename T> void chadd(T &a, T b) {a = a + b;}
 
int dx[] = {0, 0, 1, -1};
int dy[] = {1, -1, 0, 0};
const ll INF = 1001001001001001LL;
const ll MOD = 1000000007LL;

int N, A[310][310];
int main() {
    cin >> N;
    int c = 1, x = 0, y = 0;
    while(c <= N * N) {
        int dir = (y + N/2 < N ? 1 : 0);
        for(int i=0; i<N; i++) {
            int xx = x + i;
            int yy = y + (i % 2 == 0 ? 0 : (dir ? N/2 : -N/2));
            A[xx][yy] = c++;
        }
        y = y + (dir ? N/2 : -N/2);
        if(y + 1 < N and A[0][y] == 0) {
            y++;
        }
        else {
            y = 0;
            while(A[0][y] > 0) y++;
        }
    }

    for(int i=0; i<N; i++) {
        for(int j=0; j<N; j++) {
            printf("%d%c", A[i][j], " \n"[j+1 == N]);
        }
    }
    return 0;
}