a(n) = 250*n + 10.

Terms

a(0) =260a(1) =510a(2) =760a(3) =1010a(4) =1260a(5) =1510a(6) =1760a(7) =2010a(8) =2260a(9) =2510a(10) =2760a(11) =3010a(12) =3260a(13) =3510a(14) =3760a(15) =4010a(16) =4260a(17) =4510a(18) =4760a(19) =5010a(20) =5260a(21) =5510a(22) =5760a(23) =6010a(24) =6260a(25) =6510a(26) =6760a(27) =7010a(28) =7260a(29) =7510