The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A152239 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
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A152239

a(n) = -5*a(n-1) + 7*a(n-2) for n > 1 with a(0) = 1 and a(1) = -7.
(history; published version)

#26 by Michael De Vlieger at Tue Apr 09 08:09:14 EDT 2024

STATUS

reviewed

approved

#25 by Amiram Eldar at Tue Apr 09 01:28:24 EDT 2024

STATUS

proposed

reviewed

#24 by Michel Marcus at Tue Apr 09 00:54:47 EDT 2024

STATUS

editing

proposed

#23 by Michel Marcus at Tue Apr 09 00:54:41 EDT 2024

LINKS

<a href="/index/Rec#order_02">Index entries for linear recurrences with constant coefficients</a>, signature (-5,7).

CROSSREFS

Cf. A147703.

STATUS

approved

editing

#22 by Joerg Arndt at Wed Jan 03 08:45:51 EST 2024

STATUS

editing

approved

#21 by Paolo P. Lava at Wed Jan 03 07:21:04 EST 2024

FORMULA

a(n) = (1/2)*[(-5/2 + (1/2)*sqrt(53))^n + (-5/2 - (1/2)*sqrt(53))^n] +(9/106)*sqrt(53)*[(-5/2 - (1/2)*sqrt(53))^n - (-5/2 + (1/2)*sqrt(53))^n] for n >= 0. [From Paolo P. Lava, Dec 12 2008]

STATUS

approved

editing

#20 by Harvey P. Dale at Thu Apr 14 15:31:44 EDT 2022

STATUS

editing

approved

#19 by Harvey P. Dale at Thu Apr 14 15:31:42 EDT 2022

LINKS

Harvey P. Dale, <a href="/A152239/b152239.txt">Table of n, a(n) for n = 0..1000</a>

STATUS

approved

editing

#18 by Harvey P. Dale at Thu Apr 14 15:30:29 EDT 2022

STATUS

editing

approved

#17 by Harvey P. Dale at Thu Apr 14 15:30:26 EDT 2022

MATHEMATICA

LinearRecurrence[{-5, 7}, {1, -7}, 20] (* Harvey P. Dale, Apr 14 2022 *)

STATUS

approved

editing