OFFSET
1,3
LINKS
Eugen J. Ionascu, Table of n, a(n) for n = 1..100
Eugen J. Ionascu, Counting all regular octahedra in {0,1,...,n}^3, arXiv:1007.1655 [math.NT], 2010.
Eugen J. Ionascu, Andrei Markov, Platonic solids in Z^3, Journal of Number Theory, Volume 131, Issue 1, January 2011, Pages 138-145.
EXAMPLE
a(2)=1 because there is 1 way to form a regular octahedron using points of a {0,1,2}^3 lattice cube.
CROSSREFS
KEYWORD
nonn
AUTHOR
Eugen J. Ionascu, Jun 15 2010
EXTENSIONS
Edited by Ray Chandler, Jul 27 2010
STATUS
approved