a(n) = round(10000*log(n/10)).

Terms

a(0) =-23026a(1) =-16094a(2) =-12040a(3) =-9163a(4) =-6931a(5) =-5108a(6) =-3567a(7) =-2231a(8) =-1054a(9) =0a(10) =953a(11) =1823a(12) =2624a(13) =3365a(14) =4055a(15) =4700a(16) =5306a(17) =5878a(18) =6419a(19) =6931a(20) =7419a(21) =7885a(22) =8329a(23) =8755a(24) =9163a(25) =9555a(26) =9933a(27) =10296a(28) =10647a(29) =10986