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A013722
a(n) = 17^(2*n + 1).
4
17, 4913, 1419857, 410338673, 118587876497, 34271896307633, 9904578032905937, 2862423051509815793, 827240261886336764177, 239072435685151324847153, 69091933913008732880827217
OFFSET
0,1
COMMENTS
Sum_{n>=0} 1/a(n) = 17/288. - Jaume Oliver Lafont, Feb 04 2009
FORMULA
From Philippe Deléham, Nov 28 2008: (Start)
a(n) = 289*a(n-1), a(0)=17.
G.f.: 17/(1-289*x). (End)
MAPLE
seq(17^(2*n+1), n=0..10); # Nathaniel Johnston, Jun 25 2011
MATHEMATICA
17^(2*Range[0, 10]+1) (* or *) NestList[289#&, 17, 10] (* Harvey P. Dale, Aug 15 2012 *)
PROG
(Magma) [17^(2*n+1): n in [0..15]]; // Vincenzo Librandi, Jun 26 2011
(PARI) a(n)=17^(2*n+1) \\ Charles R Greathouse IV, Jul 11 2016
CROSSREFS
Bisection of A001026 (17^n).
Sequence in context: A015034 A350980 A161583 * A357419 A238610 A052286
KEYWORD
nonn,easy
STATUS
approved