/* function sumAndProduct(sum, product) {

  const arr = [];
  for (let i = 1; i <= sum / 2; i++) {
  if(sum-i + (i) === sum && ((sum - i) * i) === product) {
    arr.push(sum-i, i);
    return arr;
  }
  }
  return null;
} */

function collatzSequence(n) {
    let m = n;
  const arr = [m];
  while (m !== 1) {
    if (m % 2 === 0) {
      m /= 2;
    } else {
      m = (m * 3) + 1;
    }
    arr.push(m);
  }
  return arr;
}