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  1. #include <stdio.h>
  2.  
  3.  
  4. int func(int n){
  5. int a = -1;
  6. int i;
  7.  
  8. for(i = 1; i <= n; i++){
  9. a = 3 * a + 5;
  10. }
  11. return a;
  12. }
  13.  
  14. int main(void) {
  15. int n = 3;
  16. printf("数列anについて, n=%dのときの値は%d\n", n, func(n));
  17. return 0;
  18. }
  19.  
Success #stdin #stdout 0s 5280KB
stdin
Standard input is empty
stdout
数列anについて, n=3のときの値は38