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A013757
a(n) = 15^(3*n + 2).
1
225, 759375, 2562890625, 8649755859375, 29192926025390625, 98526125335693359375, 332525673007965087890625, 1122274146401882171630859375, 3787675244106352329254150390625, 12783403948858939111232757568359375
OFFSET
0,1
FORMULA
From Philippe Deléham, Dec 03 2008: (Start)
a(n) = 3375*a(n-1); a(0)=225.
G.f.: 225/(1-3375*x). (End)
MATHEMATICA
15^(3Range[0, 20]+2) (* or *) NestList[3375#&, 225, 20] (* Harvey P. Dale, Oct 25 2011 *)
PROG
(Magma) [15^(3*n+2): n in [0..15]]; // Vincenzo Librandi, Jun 27 2011
(Maxima) makelist(15^(3*n+2), n, 0, 20); /* Martin Ettl, Oct 21 2012 */
(PARI) a(n)=15^(3*n+2) \\ Charles R Greathouse IV, Jul 10 2016
CROSSREFS
Subsequence of A001024.
Sequence in context: A109688 A195277 A319944 * A151653 A077729 A077737
KEYWORD
nonn,easy
STATUS
approved