Popularity of left children in treeshelves avoiding pattern T213.
A278679
Popularity of left children in treeshelves avoiding pattern T213.
Terms
- a(0) =1a(1) =5a(2) =24a(3) =128a(4) =770a(5) =5190a(6) =38864a(7) =320704a(8) =2894544a(9) =28382800a(10) =300575968a(11) =3419882304a(12) =41612735632a(13) =539295974000
External references
- oeis: A278679