a(n) = n-7.

Terms

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