Home›Browse›centered polygonal number🌐EnglishEnglishDeutschEspañolFrançaisItalianoNederlandsPortuguêsSvenskaРусскийالعربية한국어中文日本語EntityQ190898· pop 21· linked from 218 articlescentered polygonal numberSign in to savefigurate numberAvailable in 20 languagesEspañolFrançaisDeutsch中文日本語РусскийPortuguêsItalianoالعربيةArmenianemlEsperantoHungarianNederlandsRomanianSvenskaTamilUkrainianShow 1 morewikifunctionsvia Wikidata sitelinks · CC0