🌐EnglishEnglishDeutschEspañolFrançaisItalianoNederlandsPortuguêsSvenskaРусскийالعربية한국어中文日本語EntityQ967999· pop 22· linked from 277 articlesheptagonal numberpolygonal numberAvailable in 22 languagesEspañolFrançais中文日本語РусскийPortuguêsItalianoالعربيةBosnianCzechemlConnectionsprime numberEntityarithmetic progressionEntityCategoriesFigurate numbers