Number of plane trees with n nodes where the sequence of branches directly under any given node is aperiodic, meaning its cyclic permutations are all different.
A317852
Number of plane trees with n nodes where the sequence of branches directly under any given node is aperiodic, meaning its cyclic permutations are all different.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =3a(4) =8a(5) =26a(6) =76a(7) =247a(8) =783a(9) =2565a(10) =8447a(11) =28256a(12) =95168a(13) =323720a(14) =1108415a(15) =3821144a(16) =13246307a(17) =46158480a(18) =161574043a(19) =567925140a(20) =2003653016a(21) =7092953340a(22) =25186731980a(23) =89690452750a(24) =320221033370
External references
- oeis: A317852