i wrote this code. but it gives Segmentation fault

#include int fibo(int n) { if(n==0)return 2; if(n==1)return -1; return 2*fibo(n+1)+3*fibo(n); } int main() { int n; printf("Enter n ="); scanf("%d",&n); printf("%d ",fibo(n)); return 0; }

please explain why

2. A sequence an is given with the following rule Write a C program to compute a17