A figurate number corresponding to a configuration of points which form a pyramid with r-sided regular polygon bases can be thought of as a generalized pyramidal number, and has the form P_n^(r) = 1/6 n(n + 1)[(r - 2) n + (5 - r)].

heptagonal pyramidal number | hexagonal pyramidal number | pentagonal pyramidal number | square pyramidal number | tetrahedral number