🌈 搜索
📅 最后修改于: 2022-03-11 14:55:18.126000 🧑 作者: Mango
The squarefree numbers are 1, 2, 3, 5, 6, 7, 10, 11, 13, 14, 15, ... (OEIS A005117). The squareful numbers (i.e., those that contain at least one square)