OFFSET
0,2
COMMENTS
Binomial transform of A081337. 7th binomial transform of (1,0,4,0,16,0,64,....).
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 0..200
Index entries for linear recurrences with constant coefficients, signature (14,-45).
FORMULA
a(n) = 14*a(n-1)-45*a(n-2), a(0)=1, a(1)=7.
G.f.: (1-7*x)/((1-5*x)*(1-9*x)).
E.g.f.: exp(7*x) * cosh(2*x).
MATHEMATICA
CoefficientList[Series[(1 - 7 x) / ((1 - 5 x) (1 - 9 x)), {x, 0, 20}], x] (* Vincenzo Librandi, Aug 08 2013 *)
PROG
(Magma) [(9^n+5^n)/2: n in [0..25]]; // Vincenzo Librandi, Aug 08 2013
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Paul Barry, Mar 18 2003
STATUS
approved