void setup() {
  println("First 61 terms:");
  for (int i = 0; i < 60; i++) {
    print(fusc(i) + " ");
  }
  println(fusc(60));
  println();
  println("Sequence elements where number of digits of the value increase:");
  int max_len = 0;
  for (int i = 0; i < 700000; i++) {
    int temp = fusc(i);
    if (str(temp).length() > max_len) {
      max_len = str(temp).length();
      println("(" + i + ", " + temp + ")");
    }
  }
}

int fusc(int n) {
  if (n <= 1) {
    return n;
  } else if (n % 2 == 0) {
    return fusc(n / 2);
  } else {
    return fusc((n - 1) / 2) + fusc((n + 1) / 2);
  }
}