Starting positions of strings of seven '3's in the decimal expansion of Pi.

Terms

a(0) =710100a(1) =3204765a(2) =12469058a(3) =18216168a(4) =19175682a(5) =36488176a(6) =36488177a(7) =42437943a(8) =54526147a(9) =76792653a(10) =87263786a(11) =95101068a(12) =112249661a(13) =113232305a(14) =118231603a(15) =130495608a(16) =130508230a(17) =198084084a(18) =201772821a(19) =206918971a(20) =228353275a(21) =233880416a(22) =244148278a(23) =248922246a(24) =248922247