Number of decimal digits in A001042.

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =2a(5) =3a(6) =5a(7) =10a(8) =19a(9) =38a(10) =76a(11) =152a(12) =303a(13) =605a(14) =1210a(15) =2420a(16) =4839a(17) =9678a(18) =19355a(19) =38709a(20) =77417a(21) =154834a(22) =309667a(23) =619333a(24) =1238665a(25) =2477330a(26) =4954660a(27) =9909319a(28) =19818638a(29) =39637275