RosettaCodeData/Task/Fibonacci-sequence/MATLAB/fibonacci-sequence-3.m

function number = fibonacci2(n)

    if n == 1
        number = 1;
    elseif n == 0
        number = 0;
    elseif n < 0
        number = ((-1)^(n+1))*fibonacci2(-n);;
    else
        number = det(gallery('dramadah',n,3));
    end

end