A weighted sum over the rooted trees of n nodes (A214568).
A262253
A weighted sum over the rooted trees of n nodes (A214568).
Terms
- a(0) =0a(1) =1a(2) =3a(3) =9a(4) =29a(5) =90a(6) =285a(7) =886a(8) =2764a(9) =8543a(10) =26387a(11) =81091a(12) =248752a(13) =760687a(14) =2321950a(15) =7072376
External references
- oeis: A262253