A first search for beyond the standard model physics in jet multiplicity patterns of multilepton events is
presented, using a data sample corresponding to an integrated luminosity of 138 fb −1 of 13 TeV proton-
proton collisions recorded by the CMS detector at the LHC. The search uses observed jet multiplicity
distributions in one-, two-, and four-lepton events to explore possible enhancements in jet production rate in
three-lepton events with and without bottom quarks. The data are found to be consistent with the standard
model expectation. The results are interpreted in terms of supersymmetric production of electroweak
chargino-neutralino superpartners with cascade decays terminating in prompt hadronic R-parity violating
interactions.