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A074562 a(n) = 4^n + 5^n + 7^n. 1
3, 16, 90, 532, 3282, 20956, 137370, 918052, 6220962, 42568876, 293289450, 2030349172, 14102205042, 98176822396, 684595023930, 4779152829892, 33389813427522, 233410633309516, 1632297014652810, 11418243549608212 (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,-83,140).

FORMULA

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

G.f.: 1/(1-4*x) + 1/(1-5*x) + 1/(1-7*x).

E.g.f.: exp(4*x) + exp(5*x) + exp(7*x). (End)

MATHEMATICA

Table[4^n + 5^n + 7^n, {n, 0, 20}]

PROG

(MAGMA) [4^n + 5^n + 7^n: n in [0..20]]; // Vincenzo Librandi, Aug 25 2011

CROSSREFS

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

Sequence in context: A026111 A026330 A146963 * A130744 A009124 A067679

Adjacent sequences:  A074559 A074560 A074561 * A074563 A074564 A074565

KEYWORD

easy,nonn

AUTHOR

Robert G. Wilson v, Aug 23 2002

STATUS

approved

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Last modified May 25 03:14 EDT 2019. Contains 323539 sequences. (Running on oeis4.)