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A013779
a(n) = 3^(4*n + 3).
1
27, 2187, 177147, 14348907, 1162261467, 94143178827, 7625597484987, 617673396283947, 50031545098999707, 4052555153018976267, 328256967394537077627, 26588814358957503287787, 2153693963075557766310747
OFFSET
0,1
FORMULA
From Philippe Deléham, Nov 25 2008: (Start)
a(n) = 81*a(n-1); a(0)=27.
G.f.: 27/(1-81*x). (End)
MATHEMATICA
3^(4*Range[0, 20]+3) (* or *) NestList[81*#&, 27, 20] (* Harvey P. Dale, May 28 2019 *)
PROG
(Magma) [3^(4*n+3): n in [0..20]]; // Vincenzo Librandi, Jun 27 2011
CROSSREFS
Subsequence of A000244.
Sequence in context: A304119 A017199 A223476 * A075081 A017307 A167725
KEYWORD
nonn,easy
STATUS
approved