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A032445
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Number the digits of the decimal expansion of Pi: 3 is the first, 1 is the second, 4 is the third and so on; a(n) gives the starting position of the first occurrence of n.
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9
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33, 2, 7, 1, 3, 5, 8, 14, 12, 6, 50, 95, 149, 111, 2, 4, 41, 96, 425, 38, 54, 94, 136, 17, 293, 90, 7, 29, 34, 187, 65, 1, 16, 25, 87, 10, 286, 47, 18, 44, 71, 3, 93, 24, 60, 61, 20, 120, 88, 58, 32, 49, 173, 9, 192, 131, 211, 405, 11, 5, 128, 220, 21, 313, 23, 8, 118, 99, 606
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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0,1
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REFERENCES
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M. J. Halm, More Sequences, Mpossibilities 83, April 2003.
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LINKS
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T. D. Noe, Table of n, a(n) for n=0..9999
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EXAMPLE
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a(10) = 50 because the first "10" in the decimal expansion of Pi occurs at digits 50 and 51:
31415926535897932384626433832795028841971693993751058209749445923...
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MATHEMATICA
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p = ToString[ FromDigits[ RealDigits[ N[ Pi, 10^4]] [[1]] ]]; Do[ Print[ StringPosition[p, ToString[n] ] [[1]] [[1]]], {n, 1, 100} ]
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CROSSREFS
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Cf. A051238, A064467.
Sequence in context: A225347 A218116 A034060 * A135088 A113467 A113458
Adjacent sequences: A032442 A032443 A032444 * A032446 A032447 A032448
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KEYWORD
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nonn,base,easy,nice,changed
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AUTHOR
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Jeff Burch, Paul Simon (paulsimn(AT)microtec.net)
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EXTENSIONS
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More terms from Simon Plouffe. Corrected by Michael Esposito and Michelle Vella (michael_esposito(AT)oz.sas.com).
More terms from Robert G. Wilson v, Oct 04 2001
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STATUS
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approved
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