The circuit must serve only laundry areas - an area is not a piece of utilization equipment, and the laundry circuit is not an individual branch circuit.
You could make the argument that a single duplex receptacle is one outlet, since it is at a single point on the wiring system. Not sure how far that would fly though.The outlet is not to serve the laundry area, but the laundry equipment.
At least one 120 volt 20 amp circuit is required in the laundry area to serve the laundry equipment with no other outlet on the circuit.
If it is a single receptacle only one outlet is provided and should be rated at 20 amps.
If it is a duplex or triplex or quad etc. multiple outlets would be provided on the circuit that specifically states "no other outlets"
The laundry circuit is required to be an Individual Branch circuit
the laundry circuit is not an individual branch circuit.
(F) Laundry Areas. In dwelling units, at least one recep-tacle outlet shall be installed for the laundry.