EntityQ5597086· pop 7· linked from 27 articlesgraph enumerationSign in to saveclass of combinatorial enumeration problemsConnectionsgraphEntitydirected graphEntitymathematicsEntityInternational Standard Book NumberEntitydigital object identifierEntitycombinatoricsEntityArthur CayleyEntityGeorge PólyaEntityOn-Line Encyclopedia of Integer SequencesEntitytreeEntityrecurrence relationEntityHandle SystemEntityclosed-form expressionEntityNeil SloaneEntityasymptotic analysisEntitygraph connectivity measureEntityFrank HararyEntityCayley's formulaEntityAcademic PressEntityenumerative combinatoricsEntityCategoriesEnumerative combinatoricsGraph enumeration