Hybrid binary rooted trees with n nodes whose root is labeled by "a".
A011272
Hybrid binary rooted trees with n nodes whose root is labeled by "a".
Terms
- a(0) =0a(1) =1a(2) =3a(3) =13a(4) =64a(5) =339a(6) =1885a(7) =10851a(8) =64109a(9) =386510a(10) =2368354a(11) =14706331a(12) =92337618a(13) =585239903a(14) =3739309053a(15) =24059542845a(16) =155756019048
External references
- oeis: A011272