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Search: id:A003731
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| A003731 |
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Number of Hamilton cycles in C_5 X P_n. |
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+0
1
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| 1, 5, 30, 160, 850, 4520, 24040, 127860, 680040, 3616880, 19236840, 102313600, 544168000, 2894227280, 15393318880, 81871340160, 435443220000, 2315960597120, 12317733383040, 65513444349760
(list; graph; listen)
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OFFSET
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1,2
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REFERENCES
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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
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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
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a(n) = 6a(n-1) - 4a(n-2) + 2a(n-3), n>3.
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CROSSREFS
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Sequence in context: A104891 A110155 A122995 this_sequence A055838 A094972 A084158
Adjacent sequences: A003728 A003729 A003730 this_sequence A003732 A003733 A003734
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KEYWORD
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nonn
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AUTHOR
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Frans Faase (Frans_LiXia(AT)wxs.nl)
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