Centered tetrahedral number

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 $n$th centered tetrahedral number, starting at $n=0$ for a single dot, is:Template:R Template:Bi

The first such numbers are:Template:R Template:Bi

References

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