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Search: id:A160049
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| A160049 |
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Denominator of the Harary number for the path graph P_n. |
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+0
2
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| 1, 1, 1, 3, 6, 5, 10, 35, 140, 126, 1260, 1155, 13860, 12870, 12012, 45045, 360360, 340340, 2042040, 1939938, 369512, 117572, 2586584, 7436429, 178474296, 171609900, 1487285800, 1434168450, 40156716600, 38818159380, 1164544781400
(list; graph; listen)
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OFFSET
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1,4
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LINKS
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Eric Weisstein's World of Mathematics, Harary Index
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EXAMPLE
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0, 2, 5, 26/3, 77/6, 87/5, 223/10, 962/35, 4609/140, 4861/126, ...
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CROSSREFS
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Cf. A160048.
Sequence in context: A118413 A096620 A093419 this_sequence A007479 A076535 A095359
Adjacent sequences: A160046 A160047 A160048 this_sequence A160050 A160051 A160052
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KEYWORD
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nonn
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AUTHOR
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E. W. Weisstein (eric(AT)weisstein.com), Apr 30, 2009
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