Number of digits in 3^n.

Terms

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