a(n+6) = -a(n+5) + a(n+4) + 3a(n+3) + a(n+2) - a(n+1) - a(n). a(n) = sign(n) if abs(n)<=3.

Terms

a(0) =0a(1) =1a(2) =1a(3) =1a(4) =5a(5) =1a(6) =7a(7) =8a(8) =5a(9) =19a(10) =11a(11) =23a(12) =35a(13) =27a(14) =64a(15) =61a(16) =85a(17) =137a(18) =133a(19) =229a(20) =275a(21) =344a(22) =529a(23) =599a(24) =875a(25) =1151a(26) =1431a(27) =2071a(28) =2560a(29) =3481