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  1. #include <stdio.h>
  2. int a(int n){
  3.     if(n==1){
  4.     	return 1;
  5.     }
  6.     else if(n==2){
  7.     	return 2;
  8.     }
  9.     else{
  10.     	return -6*a(n-1)-9*a(n-2);
  11.     }
  12. }
  13. int main(void) {
  14. 	int n=4;
  15. 	printf("%d", a(n));
  16. 	return 0;
  17. }
  18.  
Success #stdin #stdout 0s 5308KB
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108
https://ideone.com/Z920hr
language:
C (gcc 8.3)
created:
10 hours ago
visibility:
public

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