Starting positions of strings of four 4's in the decimal expansion of Pi.

Terms

a(0) =54525a(1) =57609a(2) =74544a(3) =75558a(4) =83075a(5) =97382a(6) =106823a(7) =108041a(8) =130571a(9) =135340a(10) =137820a(11) =163656a(12) =164061a(13) =171688a(14) =201039a(15) =226761a(16) =235180a(17) =249462a(18) =253741a(19) =280191a(20) =301142a(21) =331550a(22) =366179a(23) =366941a(24) =410226a(25) =416365a(26) =420021a(27) =428389a(28) =445365a(29) =451439