A nonsense sequence.

Terms

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