Index - N
| Negative | Data.PlanarGraph.Dart, Data.PlanarGraph | 
| neighboursOf | Data.PlanarGraph.Core, Data.PlanarGraph | 
| next | |
| 1 (Function) | Data.Permutation | 
| 2 (Function) | Data.IndexedDoublyLinkedList.Bare | 
| 3 (Function) | Data.IndexedDoublyLinkedList | 
| nextEdge | Data.PlanarGraph.Dual, Data.PlanarGraph | 
| nextIncidentEdge | Data.PlanarGraph.Core, Data.PlanarGraph | 
| nextSibling | Data.Tree.Util | 
| Nil | Data.BinaryTree | 
| Node | Data.BinaryTree | 
| node | Data.BinaryTree | 
| NoIntersection | |
| 1 (Type/Class) | Data.Intersection | 
| 2 (Data Constructor) | Data.Intersection | 
| NoKey | Data.OrdSeq | 
| nonEmptyIntersection | Data.Intersection | 
| nonEmptyTails | Data.Util | 
| numDarts | Data.PlanarGraph.Core, Data.PlanarGraph | 
| numEdges | Data.PlanarGraph.Core, Data.PlanarGraph | 
| numFaces | Data.PlanarGraph.Core, Data.PlanarGraph | 
| numVertices | Data.PlanarGraph.Core, Data.PlanarGraph |