OFFSET
1,5
COMMENTS
Equivalently, the number of rooted trees on n+1 nodes, where the root has degree 2, and the number of leaves is odd.
To get a pair of trees with an odd number of leaves one tree must have an even number of leaves and the other an odd number of leaves.
LINKS
CROSSREFS
KEYWORD
nonn
AUTHOR
Washington Bomfim, Dec 08 2020
STATUS
approved