Positions of the digit '1' in the decimal expansion of Pi.

Terms

a(0) =1a(1) =3a(2) =37a(3) =40a(4) =49a(5) =68a(6) =94a(7) =95a(8) =103a(9) =110a(10) =138a(11) =148a(12) =153a(13) =154a(14) =155a(15) =163a(16) =168a(17) =174a(18) =175a(19) =198a(20) =206a(21) =220a(22) =238a(23) =243a(24) =246a(25) =250a(26) =269a(27) =281a(28) =295a(29) =297