Number of rooted trees with n nodes and 9-colored non-root nodes.
A246238
Number of rooted trees with n nodes and 9-colored non-root nodes.
Terms
- a(0) =0a(1) =1a(2) =9a(3) =126a(4) =2028a(5) =35919a(6) =674964a(7) =13225632a(8) =267188229a(9) =5525568297a(10) =116400215521
External references
- oeis: A246238