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LM317HV: Heating Issue

Part Number: LM317HV
Other Parts Discussed in Thread: LMR38020

I am a starter In H/W design. My requirement is in need of Linear Voltage Regulator rating 60V(if possible more) with

atleast of 1A+.

I have tried LM317HV  (for lesser voltages) .problem I faced was heating.

Parameters:

Vin:  19V

Vout : 16V

I in : 400mA

R1 = 50 ohm

R2=  620 ohm

LM317HV , R2 are getting hot around 40+ degree.

my requirement is near 60V and 1A+ .

If you can suggest R1 and R2 Or any Other IC also OK but not switching regulators.

below is schematic except R1 and R2 are fixed ( as per data sheet)