1,1

A tetrahedron with integer edges has an integer volume only when the volume is a multiple of 3. It is unknown whether such tetrahedra exist for every multiple of 3.

Table of n, a(n) for n=1..28.

K. L. Dove and J. S. Sumner, Tetrahedra with Integer Edges and Integer Volume, Mathematics Magazine, Volume 65(2), April 1992, pp. 104-111.

Sequence in context: A068942 A116234 A065669 * A088215 A033396 A196110

Adjacent sequences: A126763 A126764 A126765 * A126767 A126768 A126769

more,nonn

William Rex Marshall, Feb 15 2007

approved