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Revision History for A010373

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A010373

Number of unrooted quartic trees with 2n (unlabeled) nodes and possessing a bicentroid; number of 2n-carbon alkanes C(2n)H(4n+2) with a bicentroid, ignoring stereoisomers.
(history; published version)

#39 by Alois P. Heinz at Fri Oct 27 21:08:16 EDT 2023

STATUS

editing

approved

#38 by Alois P. Heinz at Fri Oct 27 21:08:13 EDT 2023

LINKS

Vincenzo Librandi and Alois P. Heinz, <a href="/A010373/b010373.txt">Table of n, a(n) for n = 1..500</a> (terms n = 1..100 from Vincenzo Librandi)

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approved

editing

#37 by Joerg Arndt at Sat Dec 19 03:12:19 EST 2020

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proposed

approved

#36 by Michel Marcus at Sat Dec 19 02:46:08 EST 2020

STATUS

editing

proposed

#35 by Michel Marcus at Sat Dec 19 02:46:03 EST 2020

LINKS

E. M. Rains and N. J. A. Sloane, <a href="httphttps://www.cs.uwaterloo.ca/journals/JIS/indexcayley.html">On Cayley's Enumeration of Alkanes (or 4-Valent Trees).</a>, J. Integer Sequences, Vol. 2 (1999), Article 99.1.1.

STATUS

approved

editing

#34 by N. J. A. Sloane at Mon Jan 22 22:33:32 EST 2018

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proposed

approved

#33 by Jon E. Schoenfield at Mon Jan 22 19:17:28 EST 2018

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editing

proposed

#32 by Jon E. Schoenfield at Mon Jan 22 19:17:25 EST 2018

EXTENSIONS

Description revised by Steve Strand (snstrand(AT)comcast.net), Aug 20 2003.

STATUS

proposed

editing

#31 by Jon E. Schoenfield at Mon Jan 22 19:17:13 EST 2018

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editing

proposed

#30 by Jon E. Schoenfield at Mon Jan 22 19:17:10 EST 2018

AUTHOR

Paul Zimmermann, N. J. A. Sloane.

STATUS

proposed

editing