Number of semi-increasing binary plane trees with n vertices.
A227917
Number of semi-increasing binary plane trees with n vertices.
Terms
- a(0) =1a(1) =4a(2) =26a(3) =232a(4) =2624a(5) =35888a(6) =575280a(7) =10569984a(8) =218911872a(9) =5044346112a(10) =127980834816
External references
- oeis: A227917