👀 生成外观数列（读数序列）Generate Look-and-Say Sequence
生成外观数列（look-and-say）：从种子出发，每次用「几个几」描述上一项。可设项数与种子，本地处理。Generate the look-and-say sequence: each term describes the previous as runs of digits. Set terms and seed. Processed locally.
使用说明与常见问题How-to & FAQ
「生成外观数列（读数序列）」是什么？What is the Generate Look-and-Say Sequence tool?
生成外观数列（look-and-say）：从种子出发，每次用「几个几」描述上一项。可设项数与种子，本地处理。Generate the look-and-say sequence: each term describes the previous as runs of digits. Set terms and seed. Processed locally.
如何使用「生成外观数列（读数序列）」？How do I use the Generate Look-and-Say Sequence tool?
在「生成外观数列（读数序列）」中，按需设置「项数」、「种子」，结果会实时显示在下方，点击「复制结果」即可复制。In the Generate Look-and-Say Sequence: Adjust "Terms", "Seed"; the result appears below instantly — click "Copy result" to copy it.
项长怎么增长？How fast do the terms grow?
从种子 1 出发，项长大约按 λ^n 增长，λ≈1.303577 是康威常数；第 40 项已有 63138 位。种子 22 是唯一不变的种子：22 → 22 → 22…From seed 1 the length grows roughly like λ^n, where λ≈1.303577 is Conway's constant; term 40 already has 63,138 digits. Seed 22 is the only seed that never changes: 22 → 22 → 22…
结果精确吗？种子可以是什么？Are the results exact? What can the seed be?
精确：每一项都是逐位处理的数字串，不经过浮点。种子须为非空数字串（可以有前导 0，如 007）；留空或含非数字字符会提示。Exact: every term is built digit by digit as a text string (processed as text), with no floating point. The seed must be a non-empty digit string (leading zeros such as 007 are kept); an empty seed or non-digits give a message.
输入和输出是什么样的？What does the input and output look like?
例如在「生成外观数列（读数序列）」中把「项数」设为 5，「种子」设为 1，输出为：1 ⏎ 11 ⏎ 21 ⏎ 1211 ⏎ 111221（⏎ 表示换行）。For example, in the Generate Look-and-Say Sequence with "Terms" set to 5, "Seed" set to 1, the output is: 1 ⏎ 11 ⏎ 21 ⏎ 1211 ⏎ 111221 (⏎ marks a line break).
有哪些选项可以调整？What options can I adjust?
「生成外观数列（读数序列）」的设置：「项数」默认 10；「种子」默认 1。每次生成结果都按当前设置处理。Settings in the Generate Look-and-Say Sequence — "Terms" default 10; "Seed" default 1. The result always uses the current settings.
「生成外观数列（读数序列）」免费吗？需要注册吗？Is the Generate Look-and-Say Sequence free? Do I need an account?
「生成外观数列（读数序列）」完全免费，无需注册或安装，打开网页即可使用，手机和电脑都能用；输入的内容只在你的浏览器本地处理。The Generate Look-and-Say Sequence is completely free with no sign-up or install and works on phones and desktops; what you enter is processed only in your browser.