a(n) = 38 - n.

Terms

a(0) =38a(1) =37a(2) =36a(3) =35a(4) =34a(5) =33a(6) =32a(7) =31a(8) =30a(9) =29a(10) =28a(11) =27a(12) =26a(13) =25a(14) =24a(15) =23a(16) =22a(17) =21a(18) =20a(19) =19a(20) =18a(21) =17a(22) =16a(23) =15a(24) =14a(25) =13a(26) =12a(27) =11a(28) =10a(29) =9