C++ :

#include <iostream>
using namespace std;

int main() {
    int arr[40][40]={0}, n, k = 2;
    cin >> n;
    int x = 0, y = n / 2;
    arr[x][y] = 1;
    while(k <= n * n){
        if(x == 0 && y != n - 1){
            x = n - 1;
            y = y + 1;

        }else if(x != 0 && y == n - 1){
            x = x - 1;
            y = 0;
        }else if(x == 0 && y == n - 1){
            x = x + 1;
        }else{
            //右上方
            if(arr[x - 1][y + 1] == 0){
                x = x - 1;
                y = y + 1;
            }else{
                x = x + 1;
            }
        }
        arr[x][y] = k++;
    }


    for(int i = 0; i < n; ++i){
        for(int j = 0; j < n; ++j){
            printf("%d ", arr[i][j]);
        }
        printf("\n");
    }

    return 0;
}