A nonsense sequence.

Terms

a(0) =0a(1) =-1a(2) =0a(3) =3a(4) =-3a(5) =2a(6) =-5a(7) =6a(8) =0a(9) =-24a(10) =23a(11) =-23a(12) =47a(13) =7a(14) =88a(15) =143a(16) =-376a(17) =-5a(18) =5a(19) =514a(20) =755a(21) =654a(22) =2304a(23) =-2992a(24) =-3025a(25) =3025a(26) =2271a(27) =11279a(28) =-720a(29) =18847