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%I #16 Jan 09 2015 08:24:41
%S 130,177,178,315,809,914,1101,1139,1169,1232,1233,1256,1362,1450,1451,
%T 1499,1517,1570,1663,1725,1744,2090,2216,2222,2359,2360,2481,2622,
%U 2674,2675,3016,3047,3204,3304,3554,3579,3588,3895,4003,4016,4072
%N Starting positions of strings of 2 5's in the decimal expansion of Pi.
%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/PiDigits.html">Pi Digits</a>
%H <a href="/index/Ph#Pi314">Index entries for sequences related to the number Pi</a>
%t q=8!;z=5;a=RealDigits[Pi,10,q];lst={};Do[b=a[[1]][[n]];c=a[[1]][[n+1]];If[b==z&&c==z,AppendTo[lst,n-1]],{n,q-1}];lst (* _Vladimir Joseph Stephan Orlovsky_, Jun 19 2009 *)
%K nonn,base
%O 1,1
%A _Eric W. Weisstein_
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