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A064810
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Self-locating strings in Pi using zero-based indexing.
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4
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6, 27, 13598, 43611, 24643510, 71683711, 78714901, 268561754, 4261759184, 82638677082, 548535559133
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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1,1
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COMMENTS
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a(12) is greater than 10^12. - Alan Eliasen, Jun 17 2013
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LINKS
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Table of n, a(n) for n=1..11.
Dave Andersen, The Pi-Search Page
Tom Crawford and Brady Haran, Strings and Loops within Pi, Numberphile video (2020).
Brady Haran and Katie Steckles, 27 the Favourite Number, Numberphile video (2012).
L. Brandon Stone, 27 and the Number Pi
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EXAMPLE
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6 is the first term because Pi is 3.1415926... and the digit 6 is in position 6 after the decimal point when the first 1 after the decimal point is considered to be at position 0.
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MATHEMATICA
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Do[If[RealDigits[Pi, 10, a=i+IntegerLength@i-1, -2][[1, i;; a]]==IntegerDigits@i, Print@i], {i, 50000}] (* Giorgos Kalogeropoulos, Feb 21 2020 *)
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CROSSREFS
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Cf. A000796, A057679, A057680.
Sequence in context: A048436 A276412 A006174 * A101454 A091911 A215896
Adjacent sequences: A064807 A064808 A064809 * A064811 A064812 A064813
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KEYWORD
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base,nonn,more
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AUTHOR
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Klaus Strassburger (strass(AT)ddfi.uni-duesseldorf.de), Oct 22 2001
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EXTENSIONS
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a(6)-a(10) from Alan Eliasen, May 11 2013
a(11) from Alan Eliasen, May 28 2013
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STATUS
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approved
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