EntityQ3890817· pop 7· linked from 19 articlesAlternating factorialSign in to savemathematical conceptConnectionsmathematicsEntitynatural numberEntityprime numberEntity19Entitydigital object identifierEntityfactorialEntityabsolute valueEntityparityEntitydivisorEntity101EntitybibcodeEntity−1EntityOn-Line Encyclopedia of Integer SequencesEntityMathWorldEntityrecurrence relationEntityAmerican Mathematical SocietyEntityalternating seriesEntityEric W. WeissteinEntityprobable primeEntity1 − 1 + 2 − 6 + 24 − 120 + ⋯EntityCategoriesFactorial and binomial topicsInteger sequences