Composite numbers in continued fraction expansion of Pi (A001203).

Terms

a(0) =15a(1) =292a(2) =14a(3) =84a(4) =15a(5) =4a(6) =6a(7) =6a(8) =99a(9) =6a(10) =6a(11) =8a(12) =12a(13) =8a(14) =6a(15) =4a(16) =4a(17) =16a(18) =161a(19) =45a(20) =22a(21) =4a(22) =24a(23) =10a(24) =4a(25) =8a(26) =26a(27) =4a(28) =8a(29) =42