OFFSET
0,2
COMMENTS
The binomial transform of this sequence is {(3^n)F(n+1)} where {F(n)} is the Fibonacci sequence A000045.
LINKS
Harry J. Smith, Table of n, a(n) for n=0..200
Index entries for linear recurrences with constant coefficients, signature (1,11).
FORMULA
G.f.: (1+x)/(1-x-11*x^2). - Jaume Oliver Lafont, Sep 07 2009
MATHEMATICA
LinearRecurrence[{1, 11}, {1, 2}, 30] (* Harvey P. Dale, Oct 25 2020 *)
PROG
(PARI) { for (n=0, 200, if (n>1, a=a1 + 11*a2; a2=a1; a1=a, if (n, a=2; a2=1; a1=2, a=1)); write("b063092.txt", n, " ", a) ) } \\ Harry J. Smith, Aug 18 2009
CROSSREFS
KEYWORD
nonn
AUTHOR
John W. Layman, Apr 29 2003
STATUS
approved