🌐EnglishEnglishDeutschEspañolFrançaisItalianoNederlandsPortuguêsSvenskaTiếng ViệtРусскийالعربية한국어中文日本語EntityQ599093· pop 17· linked from 294 articlesPerrin numberNumber sequence 3,0,2,3,2,5,5,7,10,... defined by recurrence relation P(n) = P(n-2) + P(n-3).Available in 17 languagesEspañolFrançaisDeutsch中文日本語РусскийPortuguêsItalianoالعربيةBulgarianHungarianConnectionsLucas numberEntityprime numberEntityCategoriesInteger sequencesPrimality testsPseudoprimesRecurrence relations