Popularity of left children in treeshelves avoiding pattern T321.
A278678
Popularity of left children in treeshelves avoiding pattern T321.
Terms
- a(0) =1a(1) =4a(2) =19a(3) =94a(4) =519a(5) =3144a(6) =20903a(7) =151418a(8) =1188947a(9) =10064924a(10) =91426347a(11) =887296422a(12) =9164847535a(13) =100398851344
External references
- oeis: A278678