a(n) = 190*n + 20.

Terms

a(0) =20a(1) =210a(2) =400a(3) =590a(4) =780a(5) =970a(6) =1160a(7) =1350a(8) =1540a(9) =1730a(10) =1920a(11) =2110a(12) =2300a(13) =2490a(14) =2680a(15) =2870a(16) =3060a(17) =3250a(18) =3440a(19) =3630a(20) =3820a(21) =4010a(22) =4200a(23) =4390a(24) =4580a(25) =4770a(26) =4960a(27) =5150a(28) =5340a(29) =5530