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A066544
Number of spanning trees in the line graph of the product of two star graphs, each of order n, L(S_n x S_n).
0
4, 69360, 25181448044544, 500282053019322336000000000, 1364205042837678184255639132540659302400000000, 1119704625219101611411719462621416231171361585800882437615771859939328
OFFSET
2,1
EXAMPLE
NumberOfSpanningTrees(L(S_3 x S_3)) = 69360
MATHEMATICA
NumberOfSpanningTrees[LineGraph[GraphProduct[Star[n], Star[n]]]] (* First load package DiscreteMath`Combinatorica` *)
CROSSREFS
Sequence in context: A102200 A257769 A370683 * A009529 A339450 A273231
KEYWORD
nonn
AUTHOR
EXTENSIONS
Edited by Dean Hickerson, Jan 14, 2002
STATUS
approved