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A028455
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Number of perfect matchings in graph P_{2} X C_{3} X P_{n}.
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0
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4, 50, 444, 4349, 41348, 396733, 3795912, 36350866, 348013000, 3332060177, 31902067752, 305441725601, 2924400160544, 27999196885618, 268073721835248, 2566628109851821, 24573761479828684
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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REFERENCES
| Per Hakan Lundow, "Computation of matching polynomials and the number of 1-factors in polygraphs", Research report, No 12, 1996, Department of Math., Umea University, Sweden.
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LINKS
| Per Hakan Lundow, Enumeration of matchings in polygraphs, 1998.
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CROSSREFS
| Sequence in context: A189894 A197473 A202790 * A114480 A123356 A139087
Adjacent sequences: A028452 A028453 A028454 * A028456 A028457 A028458
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KEYWORD
| nonn
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AUTHOR
| Per Hakan Lundow (phl(AT)theophys.kth.se)
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