Number of trees with n unlabeled nodes such that all nodes with degree >2 lie on a single path with length equal to the tree's diameter.

A277795

Number of trees with n unlabeled nodes such that all nodes with degree >2 lie on a single path with length equal to the tree's diameter.

Terms

    a(0) =1a(1) =1a(2) =1a(3) =1a(4) =2a(5) =3a(6) =6a(7) =11a(8) =23a(9) =47a(10) =103a(11) =223a(12) =503a(13) =1132a(14) =2602a(15) =5986a(16) =13922a(17) =32433a(18) =75994a(19) =178354a(20) =419945a(21) =990134a(22) =2339033a(23) =5531459a(24) =13097217a(25) =31036235a(26) =73607165a(27) =174677138a(28) =414768535a(29) =985315906

External references