OFFSET
0,2
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 0..1000
Index entries for linear recurrences with constant coefficients, signature (5,-8,4).
FORMULA
a(n) = T(6, n), array T given by A048494.
a(0)=1, a(1)=2, a(2)=11, a(n) = 5*a(n-1)-8*a(n-2)+4*a(n-3). - Harvey P. Dale and Vincenzo Librandi, Sep 23 2011
G.f.: (1-3*x+9*x^2) / ((1-x)*(1-2*x)^2). - Colin Barker, Aug 24 2016
PROG
(Magma) [2^(n-1)*(7*n-12)+7: n in [0..30]]; // Vincenzo Librandi, Sep 23 2011
(PARI) Vec((1-3*x+9*x^2)/((1-x)*(1-2*x)^2) + O(x^40)) \\ Colin Barker, Aug 24 2016
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
EXTENSIONS
Formula from Ralf Stephan, Jan 15 2004
STATUS
approved