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A074555 a(n) = 3^n + 6^n + 7^n. 1
3, 16, 94, 586, 3778, 24826, 165034, 1105666, 7450978, 50450986, 343000474, 2340300946, 16018600978, 109951298746, 756592019914, 5217760843426, 36054083523778, 249557302572106, 1729973941999354, 12008256087645106 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

LINKS

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

Index entries for linear recurrences with constant coefficients, signature (16,-81,126).

FORMULA

From Mohammad K. Azarian, Dec 30 2008: (Start)

G.f.: 1/(1-3*x) + 1/(1-6*x) + 1/(1-7*x).

E.g.f.: exp(3*x) + exp(6*x) + exp(7*x). (End)

MATHEMATICA

Table[3^n + 6^n + 7^n, {n, 0, 20}]

PROG

(MAGMA) [3^n + 6^n + 7^n: n in [0..20]]; // Vincenzo Librandi, Aug 24 2011

CROSSREFS

Cf. A001550, A001576, A034513, A001579, A074501 - A074580.

Sequence in context: A221764 A213229 A323968 * A137644 A114174 A181067

Adjacent sequences:  A074552 A074553 A074554 * A074556 A074557 A074558

KEYWORD

easy,nonn

AUTHOR

Robert G. Wilson v, Aug 23 2002

STATUS

approved

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Last modified February 27 13:18 EST 2020. Contains 332306 sequences. (Running on oeis4.)