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A050254
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Starting positions of strings of 2 7's in the decimal expansion of Pi.
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1
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559, 621, 625, 633, 739, 742, 890, 948, 954, 1066, 1087, 1179, 1261, 1307, 1545, 1589, 1590, 1591, 1630, 1704, 1953, 2049, 2173, 2212, 2325, 2337, 2471, 2672, 3057, 3074, 3111, 3278, 3282, 3806, 3941, 4143, 4208, 4345, 4441, 4575, 4576
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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LINKS
| Index entries for sequences related to the number Pi
Eric Weisstein's World of Mathematics, Pi Digits
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MATHEMATICA
| q=8!; z=7; 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 [From Vladimir Orlovsky (4vladimir(AT)gmail.com), Jun 19 2009]
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CROSSREFS
| Sequence in context: A206123 A185772 A186134 * A139197 A136346 A100987
Adjacent sequences: A050251 A050252 A050253 * A050255 A050256 A050257
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KEYWORD
| nonn,base
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AUTHOR
| Eric Weisstein (eric(AT)weisstein.com)
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