OFFSET
1,4
COMMENTS
A polytet or polytetrahedron is a solid formed by joining platonic tetrahedra face to face.
LINKS
G. L. Sicherman, Catalogue of Polytets
EXAMPLE
a(4) = 4 because four cells can be grouped around a common edge, or have each of three attached to the fourth, or be joined in series; and the last case has distinct mirror images.
CROSSREFS
KEYWORD
nonn,hard,more
AUTHOR
George Sicherman, Aug 26 2016
STATUS
approved