a(n) = 8000*n + 40.

Terms

a(0) =8040a(1) =16040a(2) =24040a(3) =32040a(4) =40040a(5) =48040a(6) =56040a(7) =64040a(8) =72040a(9) =80040a(10) =88040a(11) =96040a(12) =104040a(13) =112040a(14) =120040a(15) =128040a(16) =136040a(17) =144040a(18) =152040a(19) =160040a(20) =168040a(21) =176040a(22) =184040a(23) =192040a(24) =200040a(25) =208040a(26) =216040a(27) =224040a(28) =232040a(29) =240040