Pentagonal Pyramidal Number

A Pyramidal Number of the form . The first few are 1, 6, 18, 40, 75, ... (Sloane's A002411). TheGenerating Function for the pentagonal pyramidal numbers is

References

Sloane, N. J. A. SequenceA002411/M4116in ``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.

• Summatory Function
• Sum-Product Number
• Sum Rule
• Sup
• Characteristic (Partial Differential Equation)
• Characteristic Polynomial
• Characteristic (Real Number)
• Character (Multiplicative)
• Character (Number Theory)
• Character Table
• Charlier's Check
• Chasles-Cayley-Brill Formula
• Chasles's Contact Theorem
• Chasles's Polars Theorem
• Chasles's Theorem
• Chebyshev Approximation Formula
• Chebyshev Constants
• Chebyshev Deviation
• Chebyshev Differential Equation
• Chebyshev Function
• Chebyshev-Gauss Quadrature
• Chebyshev Inequality
• Chebyshev Integral
• Chebyshev Integral Inequality
• Chebyshev Phenomenon