🌐EnglishEnglishDeutschEspañolFrançaisItalianoPortuguêsSvenskaРусскийالعربية한국어中文日本語EntityQ965294· pop 17· linked from 291 articlesThabit numberAlso known as Thâbit ibn Qurra number, 321 numberinteger of the form 3 · 2ⁿ - 1 for non-negative nAvailable in 17 languagesEspañolFrançaisDeutsch中文日本語РусскийItalianoالعربيةCatalanHungarianRomanianConnectionsPerrin numberEntitynatural numberEntityCategoriesArab inventionsInteger sequencesMathematics in the medieval Islamic world