A066317 Number of rooted identity (asymmetric) planar trees that can be turned over.
1, 1, 1, 1, 2, 6, 25, 92, 341, 1225, 4366, 15522, 55312, 197965, 712244, 2577106, 9375361, 34284972, 125977465, 464938190, 1722817416, 6407307544, 23909159418, 89491715106, 335908316845, 1264097675776, 4768430557021
Offset: 1
Keywords
Formula
a(n)=A066316(n-1)+1.