Number of planted planar trees (n+1 nodes) where any 2 subtrees extending from the same node have a different number of nodes.

A032009

Number of planted planar trees (n+1 nodes) where any 2 subtrees extending from the same node have a different number of nodes.

Terms

    a(0) =1a(1) =1a(2) =1a(3) =3a(4) =5a(5) =13a(6) =35a(7) =95a(8) =249a(9) =691a(10) =2007a(11) =5719a(12) =16823a(13) =49371a(14) =146755a(15) =438301a(16) =1319343a(17) =3981699a(18) =12129477a(19) =36987253a(20) =113456615a(21) =348921105a(22) =1077206189a(23) =3332120237a(24) =10347481901a(25) =32183230157a(26) =100372658801a(27) =313633257399a(28) =982232930081

External references