<jupyter_start><jupyter_text>Look and Say Sequence[The Original Question](https://mp.weixin.qq.com/s/loqKOuQakuaxzHZcRb6XXg)  QuestionA look-and-say sequence is defined as the integer sequence beginning with a single digit in which the next term is obtained by describing the previous term. An example is easier to understand:```text1        Initial sequence11       A 121       Two 11211     A 2 and A 1111221   A 1, a 2 and two 1```<jupyter_code>import re
def look_and_say(index):
    sequence = '1'
    for i in range(index):
        splits = re.findall(r'(\d)(\1*)', sequence)
        sequence = ''.join([str(len(k) + len(v)) + k[0] for (k, v) in splits])
    return sequence
print(look_and_say(10))<jupyter_output>11131221133112132113212221
{'fraction_non_alphanumeric': 0.10604026845637583, 'fraction_numerical': 0.07248322147651007, 'mean_word_length': 3.8758169934640523, 'pattern_counts': {'":': 0, '<': 4, '<?xml version=': 0, '>': 4, 'https://': 1, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
{'chain_length': '1', 'dir': 'jupyter-structured-clean-dedup', 'id': '649318', 'license': 'MIT', 'n_tokens_mistral': 290, 'n_tokens_neox': 248, 'n_words': 80, 'path': 'February/Week6/42.ipynb', 'repo_name': 'Dragon1573/Daily-Problem', 'size': '745'}