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 A089683 a(n) = 3^(4n). 1
 81, 6561, 531441, 43046721, 3486784401, 282429536481, 22876792454961, 1853020188851841, 150094635296999121, 12157665459056928801, 984770902183611232881, 79766443076872509863361, 6461081889226673298932241, 523347633027360537213511521 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Table of n, a(n) for n=1..14. Tanya Khovanova, Recursive Sequences Index entries for linear recurrences with constant coefficients, signature (81). FORMULA a(n) = 81^n. G.f.: 81*x/(1-81*x). - Philippe Deléham, Nov 25 2008 MATHEMATICA 3^(4*Range[20]) (* or *) NestList[81#&, 81, 20] (* Harvey P. Dale, Apr 09 2012 *) CROSSREFS Cf. A000244, A001019, A009971. Sequence in context: A223572 A188872 A217997 * A183506 A099372 A036515 Adjacent sequences: A089680 A089681 A089682 * A089684 A089685 A089686 KEYWORD nonn AUTHOR Douglas Winston (douglas.winston(AT)srupc.com), Jan 05 2004 EXTENSIONS More terms from Harvey P. Dale, Apr 09 2012 STATUS approved

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Last modified December 4 11:15 EST 2023. Contains 367560 sequences. (Running on oeis4.)