a(n) = n-36.

Terms

a(0) =-36a(1) =-35a(2) =-34a(3) =-33a(4) =-32a(5) =-31a(6) =-30a(7) =-29a(8) =-28a(9) =-27a(10) =-26a(11) =-25a(12) =-24a(13) =-23a(14) =-22a(15) =-21a(16) =-20a(17) =-19a(18) =-18a(19) =-17a(20) =-16a(21) =-15a(22) =-14a(23) =-13a(24) =-12a(25) =-11a(26) =-10a(27) =-9a(28) =-8a(29) =-7