Centered tetrahedral number
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Template:Short description Template:Infobox integer sequence In mathematics, a centered tetrahedral number is a centered figurate number that represents a tetrahedron. That is, it counts the dots in a three-dimensional dot pattern with a single dot surrounded by tetrahedral shells.Template:R The th centered tetrahedral number, starting at for a single dot, is:Template:R[1] Template:Bi
The first such numbers are:Template:R Template:Bi
References
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Template:Figurate numbers Template:Classes of natural numbers