a(n) = floor(1000*log(n)).

Terms

a(0) =0a(1) =693a(2) =1098a(3) =1386a(4) =1609a(5) =1791a(6) =1945a(7) =2079a(8) =2197a(9) =2302a(10) =2397a(11) =2484a(12) =2564a(13) =2639a(14) =2708a(15) =2772a(16) =2833a(17) =2890a(18) =2944a(19) =2995a(20) =3044a(21) =3091a(22) =3135a(23) =3178a(24) =3218a(25) =3258a(26) =3295a(27) =3332a(28) =3367a(29) =3401