32726domain: NAppears in sequencesNumber of skeins with vertical symmetry.at n=9A007162Binomial transform of reflected pentanacci numbers A074062: a(n) = Sum_{k=0..n}(-1)^k*binomial(n, k)*A074062(k).at n=15A074826a(n) = 2^(n+1) - 3*n.at n=13A123203Number of regular tetrahedra in an n-node-per-edge tetrahedral grid.at n=23A269747