OFFSET
1,2
LINKS
C. Chauve, S. Dulucq and O. Guibert, Enumeration of some labeled trees, Proceedings of FPSAC/SFCA 2000 (Moscow), Springer, pp. 146-157.
FORMULA
T(n,k) = binomial(n+1, k+1)*k*n^(n-k-1).
MAPLE
(n, k) -> binomial(n+1, k+1)*k*n^(n-k-1)
PROG
(PARI) tabl(nn) = for (n=1, nn, for (k=1, n, print1(binomial(n+1, k+1)*k*n^(n-k-1), ", "); ); print) \\ Michel Marcus, Jun 27 2013
CROSSREFS
KEYWORD
AUTHOR
Cedric Chauve (chauve(AT)lacim.uqam.ca), May 16 2002
STATUS
approved