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1. |
[n]
{mathematics}
▶ double factorial |
2. | A 2024-02-25 20:34:17 Jim Breen <...address hidden...> | |
1. | A* 2024-02-25 12:30:21 Robin Scott <...address hidden...> | |
Refs: | KOD追加語彙(英和) https://ja.wikipedia.org/wiki/二重階乗 |