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 A013733 a(n) = 3^(3n+2). 5
 9, 243, 6561, 177147, 4782969, 129140163, 3486784401, 94143178827, 2541865828329, 68630377364883, 1853020188851841, 50031545098999707, 1350851717672992089, 36472996377170786403, 984770902183611232881, 26588814358957503287787 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,1 COMMENTS Additive digital root of a(n) is equal to 9. - Miquel Cerda, Oct 31 2016 LINKS Vincenzo Librandi, Table of n, a(n) for n = 0..200 Tanya Khovanova, Recursive Sequences Index entries for linear recurrences with constant coefficients, signature (27). FORMULA a(n)=27*a(n-1), n>0 ; a(0)=9 . G.f.: 9/(1-27*x). - Philippe Deléham, Nov 25 2008 MAPLE seq(3^(3*n+2), n=0..15); # Nathaniel Johnston, Jun 26 2011 MATHEMATICA Table[3^(3n+2), {n, 0, 100}] (* Wesley Ivan Hurt, Oct 24 2013 *) PROG (MAGMA) [3^(3*n+2): n in [0..25]]; // Vincenzo Librandi, May 25 2011 (PARI) a(n)=3^(3*n+2) \\ Charles R Greathouse IV, Jul 11 2016 CROSSREFS Cf. A013731, A013732, A013735, A013737. Sequence in context: A267416 A268088 A285511 * A295228 A217628 A167005 Adjacent sequences:  A013730 A013731 A013732 * A013734 A013735 A013736 KEYWORD nonn,easy AUTHOR STATUS approved

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Last modified October 23 03:21 EDT 2019. Contains 328335 sequences. (Running on oeis4.)