6412032domain: NAppears in sequencesStable Poincaré series [or Poincare series] for Lie algebra of types B or C.at n=33A098789a(n) = 24*n*p(n) = 24*n*A000041(n).at n=31A183009Number of pairs of 2 X 2 matrices (X,Y) over Z/nZ such that X*Y = 0 and Y*X <> 0.at n=22A338099