Rounded first term of asymptotic approximation to A003823.

Terms

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