a(n) = n-29.

Terms

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