A nonsense sequence.

Terms

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