Maximal troughs in decimal expansions of Pi: positions of troughs equal to 8.

Terms

a(0) =1000a(1) =1240a(2) =1314a(3) =2182a(4) =2647a(5) =3567a(6) =4038a(7) =6264a(8) =6580a(9) =6582a(10) =6584a(11) =6950a(12) =7939a(13) =9151a(14) =9426a(15) =9868a(16) =9966a(17) =11014a(18) =13249a(19) =14025a(20) =17561a(21) =17985a(22) =22108a(23) =23863a(24) =25254a(25) =25404a(26) =27170a(27) =28286a(28) =28860a(29) =29892