#include <stdio.h>

void inv_tri(int, int);

int main (void)
{
    inv_tri(3, 3);

    return 0;
}


void inv_tri(int num, int ind)
{
    for (int i = num * num; i > (num - 1) * (num - 1); i--)
        printf("%2d ", i);

    printf("\n%*.s"  , 3 * (ind - num + 1), "");

    if (num > 0)
        inv_tri(num - 1, ind);
}