Starting positions of strings of 2 6's in the decimal expansion of Pi.

Terms

a(0) =117a(1) =211a(2) =257a(3) =276a(4) =309a(5) =377a(6) =516a(7) =592a(8) =892a(9) =969a(10) =981a(11) =1216a(12) =1287a(13) =1331a(14) =1528a(15) =1550a(16) =1772a(17) =1809a(18) =1894a(19) =2440a(20) =2441a(21) =2542a(22) =2747a(23) =2920a(24) =3051a(25) =3091a(26) =3127a(27) =3151a(28) =3152a(29) =3210