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A013711
a(n) = 6^(2*n+1).
3
6, 216, 7776, 279936, 10077696, 362797056, 13060694016, 470184984576, 16926659444736, 609359740010496, 21936950640377856, 789730223053602816, 28430288029929701376, 1023490369077469249536, 36845653286788892983296, 1326443518324400147398656, 47751966659678405306351616
OFFSET
0,1
FORMULA
G.f.: 6/(1-36*x). - Philippe Deléham, Nov 24 2008
a(n) = 36*a(n-1), a(0)=6. - Vincenzo Librandi, May 26 2011
From Elmo R. Oliveira, Aug 26 2024: (Start)
E.g.f.: 6*exp(36*x).
a(n) = 6*A009980(n) = A004171(n)*A013708(n) = A000400(A005408(n)). (End)
MATHEMATICA
lst={}; Do[AppendTo[lst, 6^(2*n+1)], {n, 0, 5!}]; lst (* Vladimir Joseph Stephan Orlovsky, Jan 15 2009 *)
NestList[36#&, 6, 20] (* Harvey P. Dale, Oct 18 2012 *)
PROG
(Magma) [6^(2*n+1): n in [0..20]]; // Vincenzo Librandi, May 26 2011
(PARI) a(n)=6^(2*n+1) \\ Charles R Greathouse IV, Jul 10 2016
CROSSREFS
KEYWORD
nonn,easy
STATUS
approved