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A066546
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Number of spanning trees in the line graph of the product of two (2 x n) grid graphs.
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0
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OFFSET
| 1,1
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MATHEMATICA
| NumberOfSpanningTrees[LineGraph[GraphProduct[GridGraph[2, n], GridGraph[2, n]]]] (* First load package DiscreteMath`Combinatorica` *)
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CROSSREFS
| Sequence in context: A147876 A164796 A004231 * A132653 A115544 A101846
Adjacent sequences: A066543 A066544 A066545 * A066547 A066548 A066549
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KEYWORD
| nonn,bref
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AUTHOR
| Roberto E. Martinez II (remartin(AT)fas.harvard.edu), Jan 07 2002
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EXTENSIONS
| Edited by Dean Hickerson (dean.hickerson(AT)yahoo.com), Jan 14, 2002
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