並べ替え AAAABBCCCDE https://www.wolframalpha.com/input?i=%E4%B8%A6%E3%81%B9%E6%9B%BF%E3%81%88+AAAABBCCCDE&lang=ja 11! / (4! * 2! * 3!*1!*1!) https://ja.wolframalpha.com/input?i=11%21+%2F+%284%21+*+2%21+*+3%21*1%21*+1%21%E3%80%80%29 (4+2+3+1+1)! / (4! * 2! * 3!*1!* 1!) https://www.wolframalpha.com/input?i=%284%2B2%2B3%2B1%2B1%29%21+%2F+%284%21+*+2%21+*+3%211%21+1%21%29&lang=ja permutation (11, 11)/(permutation (4, 4)*permutation (2, 2)*permutation (3, 3)*permutation (1, 1)*permutation (1, 1)) https://www.wolframalpha.com/input?i=permutation+%2811%2C+11%29%2F%28permutation+%284%2C+4%29*permutation+%282%2C+2%29*permutation+%283%2C+3%29*permutation+%281%2C+1%29*permutation+%281%2C+1%29%29&lang=ja
並べ替え AAAABBCCCDE
https://www.wolframalpha.com/input?i=%E4%B8%A6%E3%81%B9%E6%9B%BF%E3%81%88+AAAABBCCCDE&lang=ja
11! / (4! * 2! * 3!*1!*1!)
https://ja.wolframalpha.com/input?i=11%21+%2F+%284%21+*+2%21+*+3%21*1%21*+1%21%E3%80%80%29
(4+2+3+1+1)! / (4! * 2! * 3!*1!* 1!)
https://www.wolframalpha.com/input?i=%284%2B2%2B3%2B1%2B1%29%21+%2F+%284%21+*+2%21+*+3%211%21+1%21%29&lang=ja
permutation (11, 11)/(permutation (4, 4)*permutation (2, 2)*permutation (3, 3)*permutation (1, 1)*permutation (1, 1))
https://www.wolframalpha.com/input?i=permutation+%2811%2C+11%29%2F%28permutation+%284%2C+4%29*permutation+%282%2C+2%29*permutation+%283%2C+3%29*permutation+%281%2C+1%29*permutation+%281%2C+1%29%29&lang=ja