WPermutationWBeta distributionWBinomial coefficientWBinomial distributionWBinomial regressionWCatalan numberWCentral binomial coefficientWDouble factorialWDyson conjectureWGamma distributionWGould's sequenceWHockey-stick identityWHypergeometric distributionWKempner functionWLah numberWNegative binomial distributionWNegative hypergeometric distributionWPascal's pyramidWPoisson distributionWGeneralized linear modelWSierpiński triangleWStar of David theoremWStirling numbers of the second kindWTelephone number (mathematics)WTriangular number
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