The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A128415

(Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
Showing entries 1-10 | older changes

A128415

Expansion of (1-4x^2)/(1+3x+4x^2).
(history; published version)

#25 by Harvey P. Dale at Sat Sep 24 11:44:50 EDT 2022

STATUS

editing

approved

#24 by Harvey P. Dale at Sat Sep 24 11:44:48 EDT 2022

MATHEMATICA

LinearRecurrence[{-3, -4}, {1, -3, 1}, 40] (* Harvey P. Dale, Sep 24 2022 *)

STATUS

approved

editing

#23 by Alois P. Heinz at Wed May 06 09:38:15 EDT 2020

STATUS

reviewed

approved

#22 by Joerg Arndt at Wed May 06 01:50:03 EDT 2020

STATUS

proposed

reviewed

#21 by Michel Marcus at Tue May 05 13:24:06 EDT 2020

STATUS

editing

proposed

#20 by Michel Marcus at Tue May 05 13:24:04 EDT 2020

MATHEMATICA

CoefficientList[Series[(1 - 4 x^2) / (1 + 3 x + 4 x^2), {x, 0, 40}], x] (_* _Vincenzo Librandi_, Jul 20 2013 *)

STATUS

proposed

editing

#19 by Michel Marcus at Tue May 05 13:23:46 EDT 2020

STATUS

editing

proposed

#18 by Michel Marcus at Tue May 05 13:23:44 EDT 2020

LINKS

<a href="/index/Rec#order_02">Index entries for linear recurrences with constant coefficients</a>, signature (-3,-4).

STATUS

proposed

editing

#17 by Harry Richman at Tue May 05 12:53:05 EDT 2020

STATUS

editing

proposed

#16 by Harry Richman at Tue May 05 12:53:00 EDT 2020

FORMULA

a(n) = -3*a(n-1) - 4*a(n-2) for n > 2. - Harry Richman, May 05 2020

STATUS

approved

editing