Geodesic
On the kernel of tree incidence matrices
Journal of integer sequences, Tome 3 (2000) no. 1.

Voir la notice de l'article provenant de la source Electronic Library of Mathematics

Summary: We give a closed form, a generating function, and an asymptotic estimate for the sequence $(z_{n})_{n >= 1} = 1, 0, 3$, 8, 135, 1164, 21035,$ \dots $that gives the total multiplicity of the eigenvalue 0 in the set of $n^{n-2}$ tree incidence matrices of size n. 
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     author = {Bauer, Michael and Golinelli, Oliver},
     title = {On the kernel of tree incidence matrices},
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     language = {en},
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Bauer, Michael; Golinelli, Oliver. On the kernel of tree incidence matrices. Journal of integer sequences, Tome 3 (2000) no. 1. http://geodesic.mathdoc.fr/item/JIS_2000__3_1_a1/