a(n) = n - 14.

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