89349

Appears in sequences

• Stable Poincaré series [or Poincare series] for Lie algebra of type A (i.e., the variety of complex k X k matrices with distinct eigenvalues).at n=25A098787
• a(n) = Sum_{1 <= i, j, k <= n} gcd(i,j,k).at n=40A344522
• a(n) is the number of regions into which three-dimensional Euclidean space is divided by n-1 planes parallel to each face of a regular tetrahedron with edge length n, dividing the edges into unit segments.at n=28A364401