OFFSET
0,2
LINKS
Index entries for linear recurrences with constant coefficients, signature (9,-33,63,-66,36,-8).
FORMULA
G.f.: x*(8*x^3-6*x^2-5*x+4) / ((x-1)^3*(2*x-1)^3). - Colin Barker, Sep 14 2014
EXAMPLE
a(2) = 1100_2 + 1010_2 + 1001_2 = 12 + 10 + 9 = 31.
PROG
(PARI) concat(0, Vec(x*(8*x^3-6*x^2-5*x+4)/((x-1)^3*(2*x-1)^3) + O(x^100))) \\ Colin Barker, Sep 14 2014
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Henry Bottomley, Feb 13 2001
STATUS
approved