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A013744 a(n) = 9^(3*n + 1). 1
9, 6561, 4782969, 3486784401, 2541865828329, 1853020188851841, 1350851717672992089, 984770902183611232881, 717897987691852588770249, 523347633027360537213511521, 381520424476945831628649898809 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,1
LINKS
Tanya Khovanova, Recursive Sequences
FORMULA
From Philippe Deléham, Nov 30 2008: (Start)
a(n) = 729*a(n-1); a(0)=9.
G.f.: 9/(1-729*x). (End)
MATHEMATICA
NestList[729#&, 9, 10] (* Harvey P. Dale, Feb 11 2018 *)
PROG
(Magma) [9^(3*n+1): n in [0..20]]; // Vincenzo Librandi, Jun 26 2011
(PARI) a(n)=9^(3*n+1) \\ Charles R Greathouse IV, Jul 10 2016
CROSSREFS
Subsequence of A001019 (9^n).
Sequence in context: A125542 A349876 A349896 * A060761 A053975 A191961
KEYWORD
nonn,easy
AUTHOR
STATUS
approved

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Last modified March 19 01:34 EDT 2024. Contains 370952 sequences. (Running on oeis4.)