a(n) = (n+1)^5*(5+n)!/120.A154308a(n) = (n+1)^5*(5+n)!/120.Terms a(0) =1a(1) =192a(2) =10206a(3) =344064a(4) =9450000a(5) =235146240a(6) =5590680480a(7) =130799370240External referencesoeis: A154308