Many excellent designs for a new banner were submitted. We will use the best of them in rotation.
M. Klazar, Twelve countings with rooted plane trees, European Journal of Combinatorics 18 (1997), 195-210; Addendum, 18 (1997), 739-740.
Table of n, a(n) for n=1..15.
Index entries for sequences related to rooted trees
Sequence in context: A151192 A151193 A151194 * A151195 A151196 A010736
Adjacent sequences: A007853 A007854 A007855 * A007857 A007858 A007859
Martin Klazar (klazar(AT)kam.mff.cuni.cz)