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A256030
a(n) = A255502(n)/2.
1
1, 2, 7, 23, 76, 250, 824, 2753, 9190, 30756, 103014, 345563
OFFSET
1,2
LINKS
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. A255502.
Sequence in context: A291015 A273345 A042575 * A052924 A067324 A047062
KEYWORD
nonn,more
AUTHOR
N. J. A. Sloane, Mar 13 2015
STATUS
approved