Starting positions of strings of 2 7's in the decimal expansion of Pi.

Terms

a(0) =559a(1) =621a(2) =625a(3) =633a(4) =739a(5) =742a(6) =890a(7) =948a(8) =954a(9) =1066a(10) =1087a(11) =1179a(12) =1261a(13) =1307a(14) =1545a(15) =1589a(16) =1590a(17) =1591a(18) =1630a(19) =1704a(20) =1953a(21) =2049a(22) =2173a(23) =2212a(24) =2325a(25) =2337a(26) =2471a(27) =2672a(28) =3057a(29) =3074