Upgrade from r8.1 to r8.7? iSeries r7.2?

Document ID : KB000074537
Last Modified Date : 22/03/2018
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I would like to know if an upgrade can be done from 8.1 to 8.7 in one step or must we do an interim upgrade release to get to r8.7?  Does r8.1 work on OS400 version 7.2? 
iSeries 7.1, 7.2, 7.3
Only one upgrade process is required.  We expect CA 2E r8.1 will run on the iSeries v7.2 but not certified.  See the 2E Compatibility Matrix for hardware compatibility.