A255502 Number of terms in n-th order nested Lie bracket.

1, 2, 4, 14, 46, 152, 500, 1648, 5506, 18380, 61512, 206028, 691126

Offset

0,2

Comments

It would be nice to have a formula.

Links

Table of n, a(n) for n=0..12.

J. Beier, M. Olsen, A not-so-simple Lie bracket expansion, Involve, a Journal of Mathematics, Vol. 7 (2014), No. 5, 647-655 DOI: 10.2140/involve.2014.7.647.

Crossrefs

Cf. A256030.

Sequence in context: A149848 A149849 A149850 * A149851 A149852 A263740

Adjacent sequences: A255499 A255500 A255501 * A255503 A255504 A255505

Keyword

nonn,more

Author

N. J. A. Sloane, Mar 13 2015

Status

approved