Number of digits in numbers appearing in A108225.

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =2a(5) =2a(6) =4a(7) =7a(8) =13a(9) =25a(10) =50a(11) =99a(12) =196a(13) =392a(14) =783a(15) =1566a(16) =3131a(17) =6261a(18) =12521a(19) =25042a(20) =50084a(21) =100166a(22) =200332a(23) =400663a(24) =801325a(25) =1602649a(26) =3205298a(27) =6410595a(28) =12821190a(29) =25642379