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A121200 2n+7^n+5^n. 1
2, 14, 78, 474, 3034, 19942, 133286, 901682, 6155442, 42306750, 292240894, 2026154890, 14085427850, 98109713558, 684326588502, 4778079088098, 33385518460258, 233393453440366, 1632228295176110, 11417968671701306 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

LINKS

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

FORMULA

G.f.: 2*(1-7*x+x^2+29*x^3)/((1-x)^2*(1-5*x)*(1-7*x)). - Vincenzo Librandi, Feb 25 2013

MATHEMATICA

Table[2 n + 7^n + 5^n, {n, 0, 20}]  (* Harvey P. Dale, Mar 30 2011 *)

CoefficientList[Series[2 (1 - 7 x + x^2 + 29 x^3)/((1 - x)^2 (1 - 5 x)(1 - 7 x)), {x, 0, 30}], x] (* Vincenzo Librandi, Feb 25 2013

PROG

(MAGMA) [2*n+7^n+5^n: n in [0..30]]; // Vincenzo Librandi, Feb 25 2013

CROSSREFS

Cf. A074616.

Sequence in context: A278417 A133224 A183577 * A112408 A026291 A220867

Adjacent sequences:  A121197 A121198 A121199 * A121201 A121202 A121203

KEYWORD

nonn,easy

AUTHOR

Mohammad K. Azarian, Aug 19 2006

EXTENSIONS

Edited by Ray Chandler, Sep 06 2006

STATUS

approved

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Last modified January 20 16:38 EST 2019. Contains 319335 sequences. (Running on oeis4.)