In bombardments of 244Pu with 34S we discovered the α-decaying nuclide 273110. We conducted an extensive off-line search of the raw data for event sequences which fit the expected pattern of implantation in a position-sensitive detector and subsequent decay of 273110 and its descendants. We observed one three-member sequence of genetically linked α decays, resulting in Eα=11.35 MeV, a half-life of 0.3+1.3-0.2 ms, and a production cross section of about 0.4 pb for 273110. Other possible 273110 event chains were also observed. The measured α-particle energy for the N=163 nuclide 273110 provides direct evidence for a neutron shell closure at N=162.