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A003730
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Number of 2-factors in C_5 X P_n.
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0
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1, 11, 81, 666, 5431, 44466, 364061, 2981201, 24412606, 199912706, 1637069691, 13405842666, 109779463516, 898976005896, 7361648869421, 60284005131851, 493661316969811, 4042556485091321, 33104199931650186
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,2
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REFERENCES
| F. Faase, On the number of specific spanning subgraphs of the graphs G X P_n, Ars Combin. 49 (1998), 129-154.
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LINKS
| F. Faase, On the number of specific spanning subgraphs of the graphs G X P_n, Preliminary version of paper that appeared in Ars Combin. 49 (1998), 129-154.
F. Faase, Counting Hamilton cycles in product graphs
F. Faase, Results from the counting program
F. Faase, Counting Hamilton cycles in product graphs
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FORMULA
| a(n) = 9a(n-1) - 4a(n-2) - 22a(n-3) + 3a(n-4), n>4.
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CROSSREFS
| Sequence in context: A119364 A055429 A199557 * A111334 A085879 A197643
Adjacent sequences: A003727 A003728 A003729 * A003731 A003732 A003733
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KEYWORD
| nonn
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AUTHOR
| Frans Faase (Frans_LiXia(AT)wxs.nl)
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