OFFSET
0,2
COMMENTS
Fourth binomial transform is A107903.
LINKS
FORMULA
a(n) = ((1+sqrt(3))*(2*sqrt(3))^n + (1-sqrt(3))*(-2*sqrt(3))^n)/2.
a(2n) = 12^n, a(2n+1) = 6*12^n.
a(n) =2^n*A108411(n+1). - R. J. Mathar, Aug 15 2023
MATHEMATICA
LinearRecurrence[{0, 12}, {1, 6}, 30] (* Harvey P. Dale, Sep 22 2014 *)
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Paul Barry, May 27 2005
STATUS
approved