Number of n-node rooted trees in which eight equals the maximal number of nodes in paths starting at a leaf and ending at the first branching node or at the root.

A318904

Number of n-node rooted trees in which eight equals the maximal number of nodes in paths starting at a leaf and ending at the first branching node or at the root.

Terms

    a(0) =1a(1) =1a(2) =3a(3) =8a(4) =22a(5) =60a(6) =167a(7) =465a(8) =1305a(9) =3677a(10) =10407a(11) =29545a(12) =84137a(13) =240180a(14) =687169a(15) =1969805a(16) =5656352a(17) =16267296a(18) =46848655a(19) =135089324a(20) =389976522a(21) =1126951399a(22) =3259744738a(23) =9437132452a(24) =27342937037a(25) =79281644947a(26) =230037790501a(27) =667888276997

External references