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

A318901

Number of n-node rooted trees in which five 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) =59a(6) =163a(7) =450a(8) =1254a(9) =3505a(10) =9846a(11) =27740a(12) =78412a(13) =222175a(14) =630993a(15) =1795524a(16) =5118371a(17) =14613211a(18) =41780583a(19) =119605948a(20) =342793785a(21) =983487162a(22) =2824375723a(23) =8118198640a(24) =23353430828a(25) =67230869761a(26) =193682427149a(27) =558333769713

External references