67760

Appears in sequences

• Number of ordered quadruples of integers from [ 1..n ] with no global factor.at n=34A015634
• Number of reversible strings with n-1 beads of 2 colors. 4 beads are black. String is not palindromic.at n=39A032091
• Number of all possible tetrahedra of any size and orientation, formed when intersecting the original regular tetrahedron by planes parallel to its sides and dividing its edges into n equal parts.at n=31A216173
• Number of 2 X 2 matrices with entries in {0,1,...,n} and odd determinant with no entry repeated.at n=21A279483
• Number of 3-cycles in the n X n rook graph.at n=21A288961