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 A013769 a(n) = 21^(3*n + 2). 1
 441, 4084101, 37822859361, 350277500542221, 3243919932521508681, 30041942495081691894741, 278218429446951548637196401, 2576580875108218291929075869661, 23861715484377209601555171628930521, 220983347100817338120002444455525554981 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,1 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 (9261). PROG (MAGMA) [21^(3*n+2): n in [0..10]]; // Vincenzo Librandi, Jun 27 2011 (Maxima) makelist(21^(3*n+2), n, 0, 20); /* Martin Ettl, Oct 21 2012 */ (PARI) a(n)=21^(3*n+2) \\ Charles R Greathouse IV, Jul 10 2016 CROSSREFS Sequence in context: A264223 A233343 A110996 * A013899 A075268 A158322 Adjacent sequences:  A013766 A013767 A013768 * A013770 A013771 A013772 KEYWORD nonn,easy AUTHOR STATUS approved

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Last modified November 19 19:28 EST 2018. Contains 317364 sequences. (Running on oeis4.)