a(n) = 29 - n.

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