Orthogonal Array
An orthogonal array OA
is a 
Array with entries taken from an 
-set 
having theproperty that in any two rows, each ordered pair of symbols from occurs exactly once.
References
Colbourn, C. J. and Dinitz, J. H. (Eds.) CRC Handbook of Combinatorial Designs. Boca Raton, FL: CRC Press, p. 111, 1996.
- Nonnegative Integer
- Nonnegative Partial Sum
- Nonorientable Surface
- Nonpositive
- Nonsquarefree
- Nonstandard Analysis
- Nontotient
- Nonwandering
- Nonzero
- Nordstrand's Weird Surface
- Norm
- Normal
- Normal (Algebraically)
- Normal Curvature
- Normal Curve
- Normal Developable
- Normal Distribution
- Normal Distribution Function
- Normal Equation
- Normal Form
- Normal Function
- Normal Group
- Normalized Vector
- Normalizer
- Normal Magic Square