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A013769
a(n) = 21^(3*n + 2).
1
441, 4084101, 37822859361, 350277500542221, 3243919932521508681, 30041942495081691894741, 278218429446951548637196401, 2576580875108218291929075869661, 23861715484377209601555171628930521, 220983347100817338120002444455525554981
OFFSET
0,1
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
KEYWORD
nonn,easy
STATUS
approved