Central Trinomial Coefficient
The 
th central binomial coefficient is defined as the coefficient of 
in the expansion of 
. The firstfew are 1, 3, 7, 19, 51, 141, 393, ... (Sloane's A002426). This sequence cannot be expressed as a fixed number ofhypergeometric terms (Petkovsek et al. 1996, p. 160). The Generating Function is given by
See also Central Binomial Coefficient
References
Petkovsek, M.; Wilf, H. S.; and Zeilberger, D. A=B. Wellesley, MA: A. K. Peters, 1996. Sloane, N. J. A. SequenceA002426/M2673in ``An On-Line Version of the Encyclopedia of Integer Sequences.''http://www.research.att.com/~njas/sequences/eisonline.html and Sloane, N. J. A. and Plouffe, S.The Encyclopedia of Integer Sequences. San Diego: Academic Press, 1995.
- Tukey's Biweight
- Tukey's Trimean
- Tunnel Number
- Turbine
- Turing Machine
- Turning Angle
- Turán Graph
- Turán's Inequalities
- Turán's Theorem
- Tutte Polynomial
- Tutte's Graph
- Tutte's Theorem
- Twin Peaks
- Twin Prime Conjecture
- Twin Primes
- Twin Primes Constant
- Twins
- Twirl
- Twist
- Twisted Chevalley Groups
- Twisted Conic
- Twisted Sphere
- Twist Map
- Twist Move
- Twist Number