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Search: id:A153031
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| A153031 |
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Positions of prime digits of Pi |
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+0
1
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| 1, 5, 7, 9, 10, 11, 14, 16, 17, 18, 22, 25, 26, 28, 29, 30, 32, 34, 40, 44, 47, 48, 49, 52, 54, 57, 62, 64, 65, 67, 74, 77, 84, 87, 90, 91, 92, 94, 97, 100, 103, 110, 112, 113, 115, 116, 121, 124, 131, 132, 134, 136, 137, 138, 140, 141, 142, 143, 144, 150, 157, 159, 161
(list; graph; listen)
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OFFSET
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1,2
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MATHEMATICA
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Flatten[Position[ Map[If[PrimeQ[ # ], "*", # ] &, RealDigits[ N[Pi, 100]][[1]]], "*"]]
Select[ Range@ 166, PrimeQ[ RealDigits[Pi, 10, 166][[1, # ]]] &] [From Robert G. Wilson v (rgwv(AT)rgwv.com), Dec 21 2008]
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CROSSREFS
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Sequence in context: A126949 A079696 A129270 this_sequence A138892 A005523 A037084
Adjacent sequences: A153028 A153029 A153030 this_sequence A153032 A153033 A153034
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KEYWORD
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nonn,base
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AUTHOR
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Julio Cesar de la Yncera (ynceraj(AT)gmail.com), Dec 17 2008
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EXTENSIONS
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I added a more concise Mathematica coding and extended the sequence. Robert G. Wilson v (rgwv(AT)rgwv.com), Dec 21 2008
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