A013769 a(n) = 21^(3*n + 2).

441, 4084101, 37822859361, 350277500542221, 3243919932521508681, 30041942495081691894741, 278218429446951548637196401, 2576580875108218291929075869661, 23861715484377209601555171628930521, 220983347100817338120002444455525554981

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 A332531

Adjacent sequences: A013766 A013767 A013768 * A013770 A013771 A013772

Keyword

nonn,easy

Author

N. J. A. Sloane

Status

approved