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A049520
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Starting index of a string of exactly 4 consecutive equal digits in decimal expansion of Pi.
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6
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1590, 4752, 4903, 5242, 5323, 5864, 7965, 12487, 12701, 13391, 16733, 17989, 19438, 21881, 22754, 29505, 29869, 30797, 31901, 32428, 32479, 33108, 33173, 35458, 37231, 37323, 40793, 42096, 43155, 43406, 43524, 46513, 48666, 49056
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OFFSET
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0,1
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COMMENTS
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Digits 3,1,4,... are indexed 1,2,3,...
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LINKS
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MATHEMATICA
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Flatten[Position[Partition[RealDigits[Pi, 10, 50000][[1]], 6, 1], _?(Union[ Differences[Most[Rest[#]]]]=={0}&&First[Differences[#]]!=0 && Last[ Differences[#]]!=0&), {1}, Heads->False]]+1 (* Harvey P. Dale, Jun 02 2014 *)
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CROSSREFS
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KEYWORD
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nonn,base
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AUTHOR
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STATUS
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approved
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