Number of decimal digits in the numerator of A003504(n).

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =2a(6) =2a(7) =3a(8) =4a(9) =7a(10) =12a(11) =22a(12) =43a(13) =85a(14) =168a(15) =334a(16) =667a(17) =1332a(18) =2661a(19) =5321a(20) =10640a(21) =21279a(22) =42556a(23) =85110a(24) =170219a(25) =340436a(26) =680869a(27) =1361737a(28) =2723471a(29) =5446941