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A164136 a(n) = 11*n*(n+1). 2
0, 22, 66, 132, 220, 330, 462, 616, 792, 990, 1210, 1452, 1716, 2002, 2310, 2640, 2992, 3366, 3762, 4180, 4620, 5082, 5566, 6072, 6600, 7150, 7722, 8316, 8932, 9570, 10230, 10912, 11616, 12342, 13090, 13860, 14652, 15466, 16302, 17160, 18040 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 0..1000

Index entries for linear recurrences with constant coefficients, signature (3,-3,1).

FORMULA

a(n) = 22*A000217(n) = 11*A002378(n).

a(n) = 22*n + a(n-1) with n>0, a(0)=0. - Vincenzo Librandi, Nov 30 2010

G.f.: 22*x/(1-x)^3. - Vincenzo Librandi, Sep 12 2013

a(n) = 3*a(n-1) -3*a(n-2) +a(n-3). - Vincenzo Librandi, Sep 12 2013

E.g.f.: 11*x*(2 + x)*exp(x). - G. C. Greubel, Sep 12 2017

MATHEMATICA

CoefficientList[Series[(22 x) / (1 - x)^3, {x, 0, 40}], x] (* Vincenzo Librandi, Sep 12 2013 *)

PROG

(MAGMA) [11*n*(n+1): n in [0..40]]; // Vincenzo Librandi, Sep 12 2013

(PARI) a(n)=11*n*(n+1) \\ Charles R Greathouse IV, Jun 17 2017

CROSSREFS

Sequence in context: A136604 A064710 A246415 * A041946 A303858 A041948

Adjacent sequences:  A164133 A164134 A164135 * A164137 A164138 A164139

KEYWORD

nonn,easy

AUTHOR

Vincenzo Librandi, Aug 11 2009

EXTENSIONS

Offset corrected by R. J. Mathar, Aug 21 2009

STATUS

approved

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Last modified June 20 19:36 EDT 2019. Contains 324234 sequences. (Running on oeis4.)