login
A103429
(1/4)*number of acute triangles that can be formed from the points of an (n+1)X(n+1)X(n+1) lattice cube.
8
2, 194, 3434, 29356, 162190, 679654, 2323878, 6839595, 17909922, 42675551, 94125356, 194693240, 381214450, 712191373, 1277323894, 2210486280, 3706015236, 6040816887, 9601083812, 14916225896, 22701123860, 33905935285
OFFSET
1,1
CROSSREFS
Cf. all triangles in lattice cube A103426; special triangles in lattice cube: A103427, A103428, A103499, A103500, A103501; A103158 tetrahedra in lattice cube.
Cf. A190019 (analogous 2-dimensional problem).
Sequence in context: A064682 A139949 A229017 * A316901 A316888 A316890
KEYWORD
nonn
AUTHOR
Hugo Pfoertner, Feb 08 2005
STATUS
approved