Octahedral Number
A Figurate Number which is the sum of two consecutive Pyramidal Numbers,
The first few are 1, 6, 19, 44, 85, 146, 231, 344, 489, 670, 891, 1156, ... (Sloane's A005900). The GeneratingFunction for the octahedral numbers is
See also Truncated Octahedral Number
References
Conway, J. H. and Guy, R. K. The Book of Numbers. New York: Springer-Verlag, p. 50, 1996. Sloane, N. J. A. SequenceA005900/M4128in ``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.
- Prosthaphaeresis Formulas
- Proth's Theorem
- Protractor
- Prouhet's Problem
- Prussian Hat
- Prüfer Ring
- p-Series
- Pseudoanalytic Function
- Pseudocrosscap
- Pseudocylindrical Projection
- Pseudogroup
- Pseudolemniscate Case
- Pseudoperfect Number
- Pseudoprime
- Pseudorandom Number
- Pseudorhombicuboctahedron
- Pseudoscalar
- Pseudosmarandache Function
- Pseudosphere
- Pseudosquare
- Pseudotensor
- Pseudovector
- Psi Function
- p-Signature
- PSLQ Algorithm