Number Pyramid

/*
     1
    232
   34543
  4567654
 567898765

*/

#include <stdio.h>

int main()
{

    int n, c, d, num = 1, space;

    printf("Enter the number of rows ");
    scanf("%d", &n);

    space = n - 1;

    for (d = 1; d <= n; d++)
    {

        num = d;

        for (c = 1; c <= space; c++)
            printf(" ");

        space--;

        for (c = 1; c <= d; c++)
        {

            printf("%d", num);
            num++;

        }

        num--;
        num--;

        for (c = 1; c < d; c++)
        {

            printf("%d", num);
            num--;

        }

        printf("\n");

    }

    return 0;
}

OUTPUT

Enter the number of rows 5
    1
   232
  34543
 4567654
567898765