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

A318903

Number of n-node rooted trees in which seven 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) =464a(8) =1302a(9) =3666a(10) =10370a(11) =29421a(12) =83736a(13) =238891a(14) =683088a(15) =1956968a(16) =5616281a(17) =16142818a(18) =46463814a(19) =133903792a(20) =386336345a(21) =1115804329a(22) =3225691950a(23) =9333321576a(24) =27027053245a(25) =78322024353a(26) =227126864470a(27) =659069928758

External references