a(n) = 14-n.

Terms

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