Number of ordered rooted trees with n non-root nodes such that the maximal outdegree equals three.

A303271

Number of ordered rooted trees with n non-root nodes such that the maximal outdegree equals three.

Terms

    a(0) =1a(1) =4a(2) =15a(3) =53a(4) =182a(5) =616a(6) =2070a(7) =6930a(8) =23166a(9) =77429a(10) =258973a(11) =867230a(12) =2908633a(13) =9772556a(14) =32896088a(15) =110949072a(16) =374934201a(17) =1269505482a(18) =4306750577a(19) =14638006449a(20) =49843505965a(21) =170021694271a(22) =580954640775

External references