Nexus Number
A Figurate Number built up of the nexus of cells less than 
steps away from a given cell. In 
-D, the
th nexus number is given by
where
is a Binomial Coefficient. The first few -dimensional nexus numbers are given in the table below. |  | name |
| 0 | 1 | unit |
| 1 |  | Odd Number |
| 2 |  | Hex Number |
| 3 |  | Rhombic Dodecahedral Number |
References
Conway, J. H. and Guy, R. K. The Book of Numbers. New York: Springer-Verlag, pp. 53-54, 1996.
- Dougall-Ramanujan Identity
- Dougall's Theorem
- Doughnut
- Douglas-Neumann Theorem
- Dovetailing Problem
- Dowker Notation
- Down Arrow Notation
- Dozen
- Dragon Curve
- Dragon Fractal
- Draughts
- Drinfeld's Symmetric Space
- Droz-Farny Circles
- Drum
- D-Statistic
- D-Triangle
- Dual Basis
- Dual Bivector
- Dual Graph
- Duality Principle
- Duality Theorem
- Dual Map
- Dual Polyhedron
- Dual Scalar
- Dual Solid