关于递归问题

Question

function findSolution(target) {  function find(current, history) {    if (current == target) {      return history;    } else if (current > target) {      return null;    } else {      return find(current + 5, `(${history} + 5)`) ||             find(current * 3, `(${history} * 3)`);    }  }  return find(1, "1");}console.log(findSolution(24));为什么当到达63后current会慢慢减小，搞不懂，希望大佬解释下