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

Terms

a(0) =28467a(1) =28468a(2) =66846a(3) =79979a(4) =84542a(5) =89085a(6) =89086a(7) =93498a(8) =95730a(9) =119658a(10) =145459a(11) =146043a(12) =146044a(13) =150803a(14) =158335a(15) =162369a(16) =169124a(17) =172951a(18) =178501a(19) =186291a(20) =190241a(21) =191664a(22) =193042a(23) =214252a(24) =217711a(25) =222180a(26) =231023a(27) =235521a(28) =263318a(29) =263955