a(n) = 343*n - 273.

Terms

a(0) =70a(1) =413a(2) =756a(3) =1099a(4) =1442a(5) =1785a(6) =2128a(7) =2471a(8) =2814a(9) =3157a(10) =3500a(11) =3843a(12) =4186a(13) =4529a(14) =4872a(15) =5215a(16) =5558a(17) =5901a(18) =6244a(19) =6587a(20) =6930a(21) =7273a(22) =7616a(23) =7959a(24) =8302a(25) =8645a(26) =8988a(27) =9331a(28) =9674a(29) =10017