A119528 Determinant of n X n matrix of first n^2 number of trees with n unlabeled nodes (A000055).

1, 0, 7, -7288, 210319661226, -28724163065553504725184, -17273218743083166095017987886925095168489136, -3262865955763797132157936566332771517266609360571691111615623236765760

Offset: 1

Author

Jonathan Vos Post, May 27 2006

Keywords

• easy
• sign

Examples

			a(3) = 7 =
|.1..1..1|
|.1..2..3|
|.6.11.23|.
		

Links

• Alois P. Heinz, Table of n, a(n) for n = 1..17

Crossrefs

Cf. A000055, A119493.

Extensions

More terms from Alois P. Heinz, Sep 26 2011