#include <stdio.h>
int get_b(int n) {
if (n == 1) return 5;
return get_b(n - 1) + 6;
}
int get_a(int n) {
if (n == 1) return 2;
return get_a(n - 1) + get_b(n - 1);
}
int main(void) {
int n;
printf("a_%d = %d\n", n
, get_a
(n
));
return 0;
}
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