How to have MS Analysis server setup of both modes: multi dimension and tabular
When you begin installation wizard via new stand-alone Installation option, you might have missed to select Perform a new installation .. option at Installation type which is first thing to select in the wizard.  

 

After this you would proceed with Product key -> License terms -> Feature selection as Tabular  

Or following command straight-away install new SSAS Instance with Tabular mode, command has to be run from the same directory of installation media or relace Setup.exe with media path.

Setup.exe /q /IAcceptSQLServerLicenseTerms /ACTION=install /FEATURES=AS /ASSERVERMODE=TABULAR /INSTANCENAME=SSAS_Tab /INDICATEPROGRESS /ASSVCACCOUNT=.\administrator /ASSVCPASSWORD=&lt;administratorpw&gt; /ASSYSADMINACCOUNTS=.\administrator