C Language - Find sum of series

. Find sum of series: 12 + 22 + 32 + 42 … n.

#include<stdio.h>
#include<conio.h>
void main()
{
    int n,i,s=0;
    printf("Enter number: ");
    scanf("%d",&n);
    for(i=12;i<=n;i=i+10)
    {
        if(i!=12)
            printf("+");
        s=s+i;
        printf("%d",i);
    }
    printf("=%d",s);
    getch();
}

Enter number: 5
12+22+32+42=108