a(n) is the number of rooted labeled forests on n nodes that avoid the patterns 213, 231, and 312.
A318617
a(n) is the number of rooted labeled forests on n nodes that avoid the patterns 213, 231, and 312.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =13a(4) =73a(5) =503a(6) =4107a(7) =38773a(8) =415589a(9) =4986715a(10) =66238503a(11) =965102769a(12) =15306905817a(13) =262567910999
External references
- oeis: A318617