a(n) = floor(cot(n)).

Terms

a(0) =0a(1) =-1a(2) =-8a(3) =0a(4) =-1a(5) =-4a(6) =1a(7) =-1a(8) =-3a(9) =1a(10) =-1a(11) =-2a(12) =2a(13) =0a(14) =-2a(15) =3a(16) =0a(17) =-1a(18) =6a(19) =0a(20) =-1a(21) =112a(22) =0a(23) =-1a(24) =-8a(25) =0a(26) =-1a(27) =-4a(28) =1a(29) =-1