The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A199931

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Showing entries 1-10 | older changes

A199931

Trisection 1 of A199803.
(history; published version)

#21 by Alois P. Heinz at Wed Dec 27 14:54:26 EST 2017

STATUS

reviewed

approved

#20 by Robert G. Wilson v at Wed Dec 27 12:30:10 EST 2017

STATUS

proposed

reviewed

#19 by Robert G. Wilson v at Wed Dec 27 12:30:07 EST 2017

STATUS

editing

proposed

#18 by Robert G. Wilson v at Wed Dec 27 12:30:04 EST 2017

MATHEMATICA

CoefficientList[ Series[(-1 +x +x^2)/(1 +x +5x^2 -x^3 +x^4), {x, 0, 30}], x] (* or *)LinearRecurrence[{-1, -5, 1, -1}, {-1, 2, 4, -15}, 30] (* _Robert G. Wilson v_, Dec 27 2017 *)

LinearRecurrence[{-1, -5, 1, -1}, {-1, 2, 4, -15}, 30] (* Robert G. Wilson v, Dec 27 2017 *)

#17 by Robert G. Wilson v at Wed Dec 27 12:29:39 EST 2017

MATHEMATICA

CoefficientList[ Series[(-1 +x +x^2)/(1 +x +5x^2 -x^3 +x^4), {x, 0, 30}], x] (* or *)LinearRecurrence[{-1, -5, 1, -1}, {-1, 2, 4, -15}, 30] (* Robert G. Wilson v, Dec 27 2017 *)

STATUS

proposed

editing

#16 by Colin Barker at Wed Dec 27 11:20:57 EST 2017

STATUS

editing

proposed

#15 by Colin Barker at Wed Dec 27 11:20:37 EST 2017

LINKS

Colin Barker, <a href="/A199931/b199931.txt">Table of n, a(n) for n = 0..1000</a>

FORMULA

From Colin Barker, Dec 27 2017: (Start)

G.f.: -(1 - x - x^2) / (1 + x + 5*x^2 - x^3 + x^4).

a(n) = -a(n-1) - 5*a(n-2) + a(n-3) - a(n-4) for n>3.

(End)

PROG

(PARI) Vec(-(1 - x - x^2) / (1 + x + 5*x^2 - x^3 + x^4) + O(x^40)) \\ Colin Barker, Dec 27 2017

STATUS

approved

editing

#14 by N. J. A. Sloane at Wed Dec 27 01:36:17 EST 2017

STATUS

proposed

approved

#13 by Michel Marcus at Wed Dec 27 00:52:24 EST 2017

STATUS

editing

proposed

#12 by Michel Marcus at Wed Dec 27 00:52:20 EST 2017

LINKS

<a href="/index/Rec#order_04">Index entries for linear recurrences with constant coefficients</a>, signature (-1,-5,1,-1).

STATUS

proposed

editing