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A199761 (9*11^n+1)/5. 1
2, 20, 218, 2396, 26354, 289892, 3188810, 35076908, 385845986, 4244305844, 46687364282, 513561007100, 5649171078098, 62140881859076, 683549700449834, 7519046704948172, 82709513754429890, 909804651298728788, 10007851164286016666 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 0..900

Index entries for linear recurrences with constant coefficients, signature (12,-11).

FORMULA

a(n) = 11*a(n-1)-2.

a(n) = 12*a(n-1)-11*a(n-2).

G.f.: 2*(1-2*x)/((1-x)*(1-11*x)).

PROG

(MAGMA) [(9*11^n+1)/5: n in [0..30]];

CROSSREFS

Sequence in context: A067636 A226301 A000906 * A214769 A227337 A127110

Adjacent sequences:  A199758 A199759 A199760 * A199762 A199763 A199764

KEYWORD

nonn,easy

AUTHOR

Vincenzo Librandi, Nov 10 2011

STATUS

approved

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Last modified May 23 19:07 EDT 2019. Contains 323528 sequences. (Running on oeis4.)