Number of series/singleton-reduced rooted trees on strongly normal multisets of size n.
A330471
Number of series/singleton-reduced rooted trees on strongly normal multisets of size n.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =9a(4) =69a(5) =623a(6) =7803a(7) =110476a(8) =1907428
External references
- oeis: A330471