The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A018211

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A018211

Alkane (or paraffin) numbers l(10,n).
(history; published version)

#31 by N. J. A. Sloane at Fri Mar 16 16:58:10 EDT 2018

STATUS

editing

approved

#30 by N. J. A. Sloane at Fri Mar 16 16:58:08 EDT 2018

LINKS

S. M. Losanitsch, <a href="/A000602/a000602_1.pdf">Die Isomerie-Arten bei den Homologen der Paraffin-Reihe</a>, Chem. Ber. 30 (1897), 1917-1926. (Annotated scanned copy)

STATUS

approved

editing

#29 by Alois P. Heinz at Sun Feb 05 19:12:44 EST 2017

STATUS

editing

approved

#28 by Alois P. Heinz at Sun Feb 05 19:12:40 EST 2017

MAPLE

a:= n-> (Matrix([[1, 0$7, -1, -4, -20, -60]]). Matrix(12, (i, j)-> `if` (i=j-1, 1, `if` (j=1, [4, -2, -12, 17, 8, -28, 8, 17, -12, -2, 4, -1][i], 0)))^n)[1, 1]: seq (a(n), n=0..31); # _Alois P. Heinz, _, Jul 31 2008

STATUS

approved

editing

#27 by Alois P. Heinz at Sun Feb 05 19:11:59 EST 2017

STATUS

editing

approved

#26 by Alois P. Heinz at Sun Feb 05 19:11:55 EST 2017

CROSSREFS

Cf. A282011.

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approved

editing

#25 by Ray Chandler at Wed Sep 23 13:41:20 EDT 2015

STATUS

editing

approved

#24 by Ray Chandler at Wed Sep 23 13:41:15 EDT 2015

LINKS

<a href="/index/Rec#order_12">Index entries for linear recurrences with constant coefficients</a>, signature (4, -2, -12, 17, 8, -28, 8, 17, -12, -2, 4, -1).

MATHEMATICA

LinearRecurrence[{4, -2, -12, 17, 8, -28, 8, 17, -12, -2, 4, -1}, {1, 4, 20, 60, 170, 396, 868, 1716, 3235, 5720, 9752, 15912}, 32] (* Ray Chandler, Sep 23 2015 *)

STATUS

approved

editing

#23 by Joerg Arndt at Mon Jun 24 11:32:07 EDT 2013

STATUS

proposed

approved

#22 by Yosu Yurramendi at Mon Jun 24 10:14:16 EDT 2013

STATUS

editing

proposed