a(n) = 8-n.

Terms

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