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  1. #include <stdio.h>
  2.  
  3. int An(int n) 
  4. {
  5.  if(n==0) 
  6.   return 2; 
  7.  else if(n==1) 
  8.   return 7; 
  9.  else if(n==2) 
  10.   return 18; 
  11.  else
  12.   return An(n-1)+Bn(n-1); 
  13. }
  14.  
  15. int Bn(int n) 
  16. {
  17.  if(n==0) 
  18.   return 5; 
  19.  else if(n==1) 
  20.   return 11; 
  21.  else if(n==2) 
  22.   return 17; 
  23.  else if(n==3) 
  24.   return 23; 
  25.  else 
  26.   return 6+Bn(n-1); 
  27. }
  28.  
  29. int main(void) 
  30. {
  31.  int n; 
  32.  
  33.  scanf("%d",&n); 
  34.  
  35.  printf("bn=%d\n",Bn(n)); 
  36.  printf("an=%d\n",An(n));  
  37.  
  38.  return 0;
  39. }
  40.  
Success #stdin #stdout 0.01s 5288KB
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bn=23
an=35
https://ideone.com/vzKH6u
language:
C (gcc 8.3)
created:
45 days ago
visibility:
public

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