Number of uud-avoiding rooted non-crossing trees of n+1 vertices with the root 1.

A187764

Number of uud-avoiding rooted non-crossing trees of n+1 vertices with the root 1.

Terms

    a(0) =1a(1) =1a(2) =3a(3) =11a(4) =45a(5) =198a(6) =919a(7) =4445a(8) =22215a(9) =114000a(10) =597790a(11) =3191070a(12) =17289023a(13) =94845796a(14) =525838005a(15) =2941748627a(16) =16585870501a(17) =94147448172a(18) =537592229784

External references