1+1+3+1+3+5 shape program with c language

#include<stdio.h>
void series(int num);

int main(void)
{

int n;
printf("enter your number : ");
scanf("%d", &n);
printf("\n");
series(n);


return 0;
}

void  series(int num)
{


for(int i=1; i<=2*num; i+=2)
{for(int j=1;j<=i;j+=2){


printf("%d+", j);

}

}printf("\n");

return ;
}