EntityQ3503249· pop 6· linked from 3 articlesLangford pairingSign in to saveSequence of integersConnectionsmathematicsEntityInternational Standard Book NumberEntitymultiplicationEntitydigital object identifierEntityDonald KnuthEntitycombinatoricsEntityJSTOROrganizationpermutationEntityQ118398Entitymodular arithmeticEntityMartin GardnerEntityOn-Line Encyclopedia of Integer SequencesEntityMathWorldEntityThe Art of Computer ProgrammingEntityEric W. WeissteinEntityThoralf SkolemEntityMathematical ReviewsEntitySteiner systemEntityexact coverEntityStirling permutationEntityCategoriesCombinatoricsPermutations