Nearest integer to tan n.

Terms

a(0) =0a(1) =2a(2) =-2a(3) =0a(4) =1a(5) =-3a(6) =0a(7) =1a(8) =-7a(9) =0a(10) =1a(11) =-226a(12) =-1a(13) =0a(14) =7a(15) =-1a(16) =0a(17) =3a(18) =-1a(19) =0a(20) =2a(21) =-2a(22) =0a(23) =2a(24) =-2a(25) =0a(26) =1a(27) =-3a(28) =0a(29) =1