let N = +gets();
let matrix = [];
for(let i = 0; i <= N-1;i++){
    matrix.push([]);
    for (let j = 0;j <= N-1;j++){
        matrix[i][j] = 0
    }
}
let row = 0
let col = 0
console.table(matrix)
//празна матрица
let counter = 1;
let maxCounter = N * N + 1;
let up = 'up';
let down = 'down';
let right = 'right';
let left = 'left'
let direction = down;
while (counter < maxCounter){
    if (direction === down){
        if(row <= N-1 && matrix[row][col] === 0){
            matrix[row][col] = counter;
            row++;
        }else {
            counter--;
            row--;
            col++;
            direction = right;
        }
    } else if (direction === right){
        if(col <= N-1 && matrix[row][col] === 0){
            matrix[row][col] = counter;
            col++;
        } else {
            counter--;
            col--;
            row--;
            direction = up;
        }
    } else if (direction === up){
        if(row >= 0 && matrix[row][col] === 0){
            matrix[row][col] = counter;
            row--;
        } else {
            counter--;
            row++;
            col--;
            direction = left;
        }
    } else if (direction === left){
        if (col >= 0 && matrix[row][col] === 0){
            matrix[row][col] = counter;
            col--;
        } else {
            direction = down;
            row++
            col++
            counter--
        }
    }



    counter++
}
for (lines of matrix){
    console.log( lines.join(' '))
}