Number of noncrossing rooted trees with n nodes on a circle that do not have leaves at level 1.
A023053
Number of noncrossing rooted trees with n nodes on a circle that do not have leaves at level 1.
Terms
- a(0) =1a(1) =0a(2) =2a(3) =7a(4) =34a(5) =171a(6) =905a(7) =4952a(8) =27802a(9) =159254a(10) =927081a(11) =5468960a(12) =32621669a(13) =196422509a(14) =1192294778a(15) =7288208927a(16) =44825586130a(17) =277196752569
External references
- oeis: A023053