Starting positions of strings of three 6's in the decimal expansion of Pi.

Terms

a(0) =2440a(1) =3151a(2) =4000a(3) =4435a(4) =5403a(5) =6840a(6) =10163a(7) =10335a(8) =10591a(9) =13594a(10) =15888a(11) =16109a(12) =18504a(13) =20231a(14) =21880a(15) =21881a(16) =23057a(17) =23511a(18) =24566a(19) =25948a(20) =26212a(21) =27703a(22) =27841a(23) =29666a(24) =29868a(25) =29869a(26) =32427a(27) =32428a(28) =33363a(29) =36353