Number of rooted trees with n nodes such that no more than four subtrees of the same size extend from the same node.

A318798

Number of rooted trees with n nodes such that no more than four subtrees of the same size extend from the same node.

Terms

    a(0) =0a(1) =1a(2) =1a(3) =2a(4) =4a(5) =9a(6) =19a(7) =46a(8) =110a(9) =273a(10) =684a(11) =1746a(12) =4503a(13) =11758a(14) =30943a(15) =82118a(16) =219337a(17) =589477a(18) =1592427a(19) =4322386a(20) =11781435a(21) =32235285a(22) =88502260a(23) =243747792a(24) =673238061a(25) =1864400173a(26) =5175591107a(27) =14399672901a(28) =40146278964a(29) =112143682477

External references