a(n) = 10*log_10(n) rounded to the nearest integer.

Terms

a(0) =0a(1) =3a(2) =5a(3) =6a(4) =7a(5) =8a(6) =8a(7) =9a(8) =10a(9) =10a(10) =10a(11) =11a(12) =11a(13) =11a(14) =12a(15) =12a(16) =12a(17) =13a(18) =13a(19) =13a(20) =13a(21) =13a(22) =14a(23) =14a(24) =14a(25) =14a(26) =14a(27) =14a(28) =15a(29) =15