Function fib_sequential

check/TestHighsParallel.cpp:18–21

const bool dev_run = false;

int64_t fib_sequential(const int64_t n) {
  if (n <= 1) return 1;
  return fib_sequential(n - 1) + fib_sequential(n - 2);
}

int64_t fib(const int64_t n) {
  if (n <= 20) return fib_sequential(n);