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Operad: Noncrossing Trees

abbreviations
NCT, RWD
category
Zset
type
non-symetrique
dimensions

1, 2, 7, 30, 143, 728, 3876, 21318

OEIS: A006013

Formula: binomial(3*n-2,n-1)/n

Serie: (x*(1-x)**2).reverse()

properties
binary, quadratic, Koszul
generateurs
  • generator < of arity 2 of degree 0
  • generator > of arity 2 of degree 1
relations
  • equality: (x>y)<z = x>(y<z)
morphisms
→ Dend, → RWT, → NCP, → Trip

References