🌐EnglishEnglishDeutschEspañolFrançaisItalianoNederlandsPortuguêsSvenskaTiếng ViệtTürkçeРусскийไทย中文日本語EntityQ2661866· pop 22· linked from 311 articlesLeyland numbera natural number nontrivially representable in the form x^y + y^xConnections300EntityPerrin numberEntityCategoriesInteger sequences