Icosahedral number
An icosahedral number is a figurate number that represents an icosahedron. The nth icosahedral number is given by the formula
The first such numbers are 1, 12, 48, 124, 255, 456, 742, 1128, 1629, 2260, 3036, 3972, 5083, … (sequence A006564 in the OEIS).
References
Kim, Hyun Kwang, On Regular Polytope Numbers (PDF), archived from the original (PDF) on 2010-03-07
Classes of natural numbers | |||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Powers and related numbers | |||||||||||||||||||||
| Of the form a × 2b ± 1 | |||||||||||||||||||||
| Other polynomial numbers | |||||||||||||||||||||
| Recursively defined numbers | |||||||||||||||||||||
| Possessing a specific set of other numbers | |||||||||||||||||||||
| Expressible via specific sums | |||||||||||||||||||||
| Generated via a sieve | |||||||||||||||||||||
| Code related | |||||||||||||||||||||
| Figurate numbers |
| ||||||||||||||||||||
| Pseudoprimes | |||||||||||||||||||||
| Combinatorial numbers | |||||||||||||||||||||
| Arithmetic functions |
| ||||||||||||||||||||
| Dividing a quotient | |||||||||||||||||||||
| Other prime factor or divisor related numbers | |||||||||||||||||||||
| Recreational mathematics | |||||||||||||||||||||
| |||||||||||||||||||||
This article is issued from
Wikipedia.
The text is licensed under Creative Commons - Attribution - Sharealike.
Additional terms may apply for the media files.