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A074504 a(n) = 1^n + 2^n + 8^n. 0
3, 11, 69, 521, 4113, 32801, 262209, 2097281, 16777473, 134218241, 1073742849, 8589936641, 68719480833, 549755822081, 4398046527489, 35184372121601, 281474976776193, 2251799813816321, 18014398509744129, 144115188076380161 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

LINKS

Table of n, a(n) for n=0..19.

Index entries for linear recurrences with constant coefficients, signature (11,-26,16).

FORMULA

From Mohammad K. Azarian, Dec 26 2008: (Start)

G.f.: 1/(1-x) + 1/(1-2*x) + 1/(1-8*x).

E.g.f.: e^x + e^(2*x) + e^(8*x). (End)

a(n) = 10*a(n-1) - 16*a(n-2) + 7 with a(0)=3, a(1)=11. - Vincenzo Librandi, Jul 21 2010

MATHEMATICA

Table[1^n + 2^n + 8^n, {n, 0, 20}]

CROSSREFS

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

Sequence in context: A201259 A177008 A218923 * A126115 A018193 A121945

Adjacent sequences:  A074501 A074502 A074503 * A074505 A074506 A074507

KEYWORD

easy,nonn

AUTHOR

Robert G. Wilson v, Aug 23 2002

STATUS

approved

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Last modified August 7 09:16 EDT 2020. Contains 336274 sequences. (Running on oeis4.)