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A074561 a(n) = 4^n + 5^n + 6^n. 1
3, 15, 77, 405, 2177, 11925, 66377, 374445, 2135777, 12292965, 71280377, 415819485, 2437700177, 14348506005, 84736115177, 501776304525, 2977992765377, 17706778767045, 105443373410777, 628708104245565 (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 (15,-74,120).

FORMULA

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

G.f.: 1/(1-4*x) + 1/(1-5*x) + 1/(1-6*x).

E.g.f.: exp(4*x) + exp(5*x) + exp(6*x). (End)

MATHEMATICA

Table[4^n + 5^n + 6^n, {n, 0, 19}]

PROG

(MAGMA) [4^n + 5^n + 6^n: n in [0..20]]; // Vincenzo Librandi, Aug 24 2011

CROSSREFS

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

Sequence in context: A125700 A037766 A037654 * A026115 A027911 A227954

Adjacent sequences:  A074558 A074559 A074560 * A074562 A074563 A074564

KEYWORD

easy,nonn

AUTHOR

Robert G. Wilson v, Aug 23 2002

STATUS

approved

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Last modified June 25 12:01 EDT 2019. Contains 324352 sequences. (Running on oeis4.)