Dodecahedral number
A dodecahedral number is a figurate number that represents a dodecahedron. The nth dodecahedral number is given by the formula
The first such numbers are 0, 1, 20, 84, 220, 455, 816, 1330, 2024, 2925, 4060, 5456, 7140, 9139, 11480, … (sequence A006566 in OEIS).
References
Kim, Hyun Kwang, On Regular Polytope Numbers (PDF), archived from the original (PDF) on 2010-03-07
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