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URL: https://oeis.org/A066317

⇱ A066317 - OEIS

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A066317
Number of rooted identity (asymmetric) planar trees that can be turned over.
0
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
1,5
FORMULA
a(n)=A066316(n-1)+1.
CROSSREFS
Sequence in context: A103063 A220191 A030228 * A027104 A019048 A289604
KEYWORD
nonn
AUTHOR
Christian G. Bower, Dec 13 2001
STATUS
approved