Flight Crew Air Transport Pilot (ATP)
Flight Crew Last 90 Days 123; Flight Crew Total 21500; Flight Crew Type 6950
Aircraft Equipment Problem Less Severe
General Maintenance Action
Aircraft
En route at FL350 number one engine N1 vibration increased to as much as 8.1 units.  Reduced thrust turned on engine anti-ice (temperature -44) and complied with the checklists. Called Dispatch; patch to Maintenance Control. Says no relation to leak deferred before flight. After a discussion with all parties [we] agreed to continue to destination. As we descended to landing vibration was reduced; landed uneventfully.
Air Carrier Captain experiences excessive N1 vibration at FL350. After a discussion with Maintenance Control the Captain elects to continue to destination. The vibration diminishes as the aircraft descends for approach.