a(n) = ceiling(100*log_2(n)).

Terms

a(0) =0a(1) =100a(2) =159a(3) =200a(4) =233a(5) =259a(6) =281a(7) =300a(8) =317a(9) =333a(10) =346a(11) =359a(12) =371a(13) =381a(14) =391a(15) =400a(16) =409a(17) =417a(18) =425a(19) =433a(20) =440a(21) =446a(22) =453a(23) =459a(24) =465a(25) =471a(26) =476a(27) =481a(28) =486a(29) =491