3626149

Properties

Appears in sequences

• Wedderburn-Etherington numbers: unlabeled binary rooted trees (every node has outdegree 0 or 2) with n endpoints (and 2n-1 nodes in all).at n=23A001190
• Number of n-node rooted unlabeled trees with outdegree <= 2 and exactly 1 edge at the root.at n=23A036656
• Prime Wedderburn-Etherington numbers.at n=7A136402
• Number of rooted binary trees (in which all inner nodes have precisely two children) with n leaves and with maximal number of cherries (i.e., maximal number of pendant subtrees with two leaves).at n=45A344613
• Prime numbersat n=258512