Differences between successive locations of zeros in decimal expansion of Pi.

Terms

a(0) =18a(1) =4a(2) =11a(3) =6a(4) =6a(5) =8a(6) =12a(7) =9a(8) =10a(9) =5a(10) =7a(11) =4a(12) =14a(13) =13a(14) =5a(15) =3a(16) =9a(17) =19a(18) =12a(19) =38a(20) =3a(21) =16a(22) =6a(23) =17a(24) =4a(25) =16a(26) =1a(27) =3a(28) =16a(29) =3