🌐EnglishEnglishDeutschFrançaisItalianoPortuguêsРусскийالعربية日本語EntityQ3900011· pop 7· linked from 21 articlesAlternating permutationtype of permutation studied in combinatoricsAvailable in 7 languagesFrançaisDeutschРусскийPortuguêsItalianoالعربيةvia Wikidata sitelinks · CC0Connectionstrigonometric functionEntityeven and odd functionsEntityCategoriesEnumerative combinatoricsPermutations