a(n) = ceiling(100*log(n)).

Terms

a(0) =0a(1) =70a(2) =110a(3) =139a(4) =161a(5) =180a(6) =195a(7) =208a(8) =220a(9) =231a(10) =240a(11) =249a(12) =257a(13) =264a(14) =271a(15) =278a(16) =284a(17) =290a(18) =295a(19) =300a(20) =305a(21) =310a(22) =314a(23) =318a(24) =322a(25) =326a(26) =330a(27) =334a(28) =337a(29) =341