A028351 Dimension of invariant subspace of Lie polynomials of degree 2n under action of SL_2(C) on free Lie algebra of rank 2.

1, 0, 1, 1, 5, 9, 33, 85, 276, 827, 2693, 8626, 28639, 95393, 323367, 1104525, 3813797, 13266366, 46509357, 164098390

Offset: 1

Author

Murray R. Bremner

Keywords

• nonn

References

• M. Bremner, Lie invariants of degree ten, Int. J. Math. Game Theory Algebra, 8 (1998), no. 2-3, 115-122.

Formula

Formula in C. Reutenauer, Free Lie Algebras, pages 206-208.