a(n) = 256*n - 1.

Terms

a(0) =255a(1) =511a(2) =767a(3) =1023a(4) =1279a(5) =1535a(6) =1791a(7) =2047a(8) =2303a(9) =2559a(10) =2815a(11) =3071a(12) =3327a(13) =3583a(14) =3839a(15) =4095a(16) =4351a(17) =4607a(18) =4863a(19) =5119a(20) =5375a(21) =5631a(22) =5887a(23) =6143a(24) =6399a(25) =6655a(26) =6911a(27) =7167a(28) =7423a(29) =7679