Enneadiminished icosiheptaheptacontadipeton

The enneadiminished icosiheptaheptacontadipeton, or endjak, is a convex scaliform polypeton that consists of 9 triangular duoantifastegia, 18 square tettenes and 6 hexatera. Six triangular duoantifastegia, seven square tettenes, and two hexatera meet each vertex.

It is the convex hull of two perpendicular dual-oriented triangular duoprisms.

Vertex coordinates
The vertices of an enneadiminished icosiheptaheptacontadipeton of edge length 1 are given by: