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A074567 a(n) = 4^n + 6^n + 9^n. 1
3, 19, 133, 1009, 8113, 67849, 582193, 5079289, 44791873, 397760329, 3548299153, 31748050969, 284623096033, 2554993631209, 22955425054513, 206362390821049, 1855845593726593, 16694125538980489, 150196263973144273 (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 (19,-114,216).

FORMULA

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

G.f.: 1/(1-4*x) + 1/(1-6*x) + 1/(1-9*x).

E.g.f.: exp(4*x) + exp(6*x) + exp(9*x). (End)

MATHEMATICA

Table[4^n + 6^n + 9^n, {n, 0, 20}]

PROG

(MAGMA) [4^n + 6^n + 9^n: n in [0..20]]; // Vincenzo Librandi, Aug 25 2011

CROSSREFS

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

Sequence in context: A063395 A226459 A256092 * A091346 A305550 A035086

Adjacent sequences:  A074564 A074565 A074566 * A074568 A074569 A074570

KEYWORD

easy,nonn

AUTHOR

Robert G. Wilson v, Aug 23 2002

STATUS

approved

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Last modified October 22 19:53 EDT 2019. Contains 328319 sequences. (Running on oeis4.)