Number of rooted identity trees with n colored non-root nodes where the set of colors equals {1,...,k} for some k <= n.
A319220
Number of rooted identity trees with n colored non-root nodes where the set of colors equals {1,...,k} for some k <= n.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =32a(4) =362a(5) =5454a(6) =102469a(7) =2312418a(8) =60994931a(9) =1842667249a(10) =62760237328
External references
- oeis: A319220