Number of terms in {b(1)..b(n)} relatively prime to b(n), where b(n) = A001597(n).

Terms

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