Floor(r*a(n-1)) - floor(r*a(n-2)), where r = 3/2, a(0) = 1, a(1) = 1.

Terms

a(0) =1a(1) =1a(2) =0a(3) =-1a(4) =-2a(5) =-1a(6) =1a(7) =3a(8) =3a(9) =0a(10) =-4a(11) =-6a(12) =-3a(13) =4a(14) =11a(15) =10a(16) =-1a(17) =-17a(18) =-24a(19) =-10a(20) =21a(21) =46a(22) =38a(23) =-12a(24) =-75a(25) =-95a(26) =-30a(27) =98a(28) =192a(29) =141