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A160049
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Denominator of the Harary number for the path graph P_n.
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1
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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; refs; listen; history; internal format)
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OFFSET
| 1,4
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COMMENTS
| Is this the same as A096620? [From R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Jan 26 2010]
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LINKS
| Eric Weisstein's World of Mathematics, Harary Index
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EXAMPLE
| 0, 2, 5, 26/3, 77/6, 87/5, 223/10, 962/35, 4609/140, 4861/126, ...
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CROSSREFS
| Cf. A160048.
Sequence in context: A118413 A096620 A093419 * A007479 A076535 A095359
Adjacent sequences: A160046 A160047 A160048 * A160050 A160051 A160052
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KEYWORD
| nonn
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AUTHOR
| E. W. Weisstein (eric(AT)weisstein.com), Apr 30, 2009
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