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#48 by Charles R Greathouse IV at Thu Sep 08 08:45:14 EDT 2022
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(MAGMAMagma) m:=20; R<x>:=PowerSeriesRing(Integers(), m); Coefficients(R!( (1+x)/(1-123*x+x^2) )); // G. C. Greubel, Jan 13 2019
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Discussion
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| Thu Sep 08
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| OEIS Server: https://oeis.org/edit/global/2944
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#47 by Bruno Berselli at Wed Jan 22 03:31:53 EST 2020
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#46 by Michel Marcus at Wed Jan 22 02:26:57 EST 2020
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#45 by Michel Marcus at Wed Jan 22 02:26:46 EST 2020
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H. C. Williams and R. K. Guy, <a href="http://www.emis.de/journals/INTEGERS/papers/a17self/a17self.Abstract.html ">Some Monoapparitic Fourth Order Linear Divisibility Sequences</a> Integers, Volume 12A (2012) The John Selfridge Memorial Volume.
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proposed
editing
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#44 by Jon E. Schoenfield at Tue Jan 21 23:39:51 EST 2020
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#43 by Jon E. Schoenfield at Tue Jan 21 23:39:48 EST 2020
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a(n) = (-2/11)*Ii*((-1)^n)*T(2*n+1, 11*Ii/2) with the imaginary unit Ii and Chebyshev's polynomials of the first kind. See the T-triangle A053120.
a(n) = 123*a(n-1) - a(n-2) for n> > 1, a(0)=1, a(1)=124 . - _. - _Philippe Deléham_, Nov 18 2008
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approved
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#42 by Susanna Cuyler at Fri Apr 19 13:40:55 EDT 2019
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#41 by Michel Marcus at Fri Apr 19 13:30:55 EDT 2019
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#40 by Michael De Vlieger at Fri Apr 19 13:00:48 EDT 2019
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#39 by Michael De Vlieger at Fri Apr 19 13:00:43 EDT 2019
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Giovanni Lucca, <a href="http://forumgeom.fau.edu/FG2019volume19/FG201902index.html">Integer Sequences and Circle Chains Inside a Hyperbola</a>, Forum Geometricorum (2019) Vol. 19, 11-16.
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