a(n) = ceiling(10000*log_2(n)).

Terms

a(0) =0a(1) =10000a(2) =15850a(3) =20000a(4) =23220a(5) =25850a(6) =28074a(7) =30000a(8) =31700a(9) =33220a(10) =34595a(11) =35850a(12) =37005a(13) =38074a(14) =39069a(15) =40000a(16) =40875a(17) =41700a(18) =42480a(19) =43220a(20) =43924a(21) =44595a(22) =45236a(23) =45850a(24) =46439a(25) =47005a(26) =47549a(27) =48074