OFFSET
0,1
COMMENTS
The squares of these terms appear in A159274.
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 0..1000
Index entries for linear recurrences with constant coefficients, signature (2).
FORMULA
G.f.: 27/(1-2*x).
From Elmo R. Oliveira, Sep 14 2024: (Start)
E.g.f.: 27*exp(2*x).
a(n) = 27*A000079(n).
a(n) = 2*a(n-1) for n > 0. (End)
MATHEMATICA
Table[27 2^n, {n, 0, 40}] (* Vincenzo Librandi, Sep 30 2013 *)
NestList[2#&, 27, 30] (* Harvey P. Dale, Apr 17 2022 *)
PROG
(Magma)[27*2^n: n in [0..40]];
(PARI) apply(n -> 27*2^n, [0..40]) \\ Satish Bysany, Mar 06 2017
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Vincenzo Librandi, Dec 05 2010
STATUS
approved