Revision History for A005688
(Underlined text is an addition;
strikethrough text is a deletion.)
Showing entries 1-10
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#21 by Harvey P. Dale at Mon Aug 26 15:54:58 EDT 2019
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#20 by Harvey P. Dale at Mon Aug 26 15:54:54 EDT 2019
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| MATHEMATICA
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LinearRecurrence[{2, 0, -2, 1, 2, -2, 0, 0, 0, -1}, {1, 2, 3, 5, 7, 10, 14, 20, 30, 45}, 40] (* Harvey P. Dale, Aug 26 2019 *)
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| STATUS
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approved
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#19 by R. J. Mathar at Tue Jun 11 06:53:25 EDT 2019
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#18 by R. J. Mathar at Tue Jun 11 06:53:15 EDT 2019
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| LINKS
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<a href="/index/Rec#order_10">Index entries for linear recurrences with constant coefficients</a>, signature (2,0,-2,1,2,-2,0,0,0,-1).
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| KEYWORD
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nonn,easy
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#17 by N. J. A. Sloane at Fri Nov 10 14:09:22 EST 2017
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#16 by N. J. A. Sloane at Fri Nov 10 14:09:19 EST 2017
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| LINKS
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R. K. Guy, <a href="/A005251/a005251_1.pdf">Anyone for Twopins?</a>, in D. A. Klarner, editor, The Mathematical Gardner. Prindle, Weber and Schmidt, Boston, 1981, pp. 2-15. [Annotated scanned copy, with permission]
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| EXTENSIONS
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More terms from Johannes W. Meijer, Aug 24 2013
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#15 by Charles R Greathouse IV at Wed Apr 30 01:30:30 EDT 2014
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| FORMULA
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G.f.: (x^5*(1-x^2+x^3-2*x^5-x^6-x^7-x^8-x^9))/((1-x^2-x^5)*(1-2*x+x^2-x^5)). - )). - _Ralf Stephan, _, Apr 22 2004
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Discussion
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| Wed Apr 30
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| OEIS Server: https://oeis.org/edit/global/2171
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#14 by N. J. A. Sloane at Fri Mar 28 02:30:10 EDT 2014
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| COMMENTS
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The complete sequence by _R. K. Guy _ in "Anyone for Twopins?" starts with a(0) = 0, a(1) = 1, a(2) = 1, a(3) = 1 and a(4) =1. The formula for a(n) confirms these values. - Johannes W. Meijer, Aug 24 2013
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Discussion
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| Fri Mar 28
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| OEIS Server: https://oeis.org/edit/global/2135
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#13 by Ralf Stephan at Sun Aug 25 05:16:27 EDT 2013
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#12 by Joerg Arndt at Sun Aug 25 03:34:19 EDT 2013
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