A220833 Erroneous version of A339782.

2, 11, 28, 109, 470, 2145, 10300, 51135, 260930, 1359391

Offset: 1

Author

Keywords

• dead

Comments

Number of unrooted non-binary leaf-multi-labeled trees with n leaves on the label set [2].

The reference has a mistake in formula 4.3. Rather than "k*g(n-1,k) + g(n,k) + Sum_{j=1..n-1} g(j,k)*g(n-j,k)" it should be "k*g(n-1,k) + g(n,k) - Sum_{j=1..n-1} g(j,k)*g(n-j,k)". Table 4.3 (A220832, this sequence, A220834, A220835) is consequently also incorrect.

Links

• V. P. Johnson, Enumeration Results on Leaf Labeled Trees, Ph. D. Dissertation, Univ. Southern Calif., 2012.