A193154 Numbers of spanning trees of the triangular graphs.

1, 3, 384, 2048000, 518400000000, 7192939211224252416, 6266608900058816862941609984, 388040545518272905743826242144898646016, 1911283738799704422875920401026220178381209600000000

Offset

2,2

Comments

Triangular graphs are defined for n>=2.

Links

Alois P. Heinz, Table of n, a(n) for n = 2..20

Eric Weisstein's World of Mathematics, Spanning Tree

Eric Weisstein's World of Mathematics, Triangular Graph

Crossrefs

Sequence in context: A316950 A317730 A193131 * A120061 A187942 A244670

Adjacent sequences: A193151 A193152 A193153 * A193155 A193156 A193157

Keyword

nonn

Author

Eric W. Weisstein, Jul 16 2011

Status

approved