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Search: id:A004601
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| A004601 |
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Expansion of Pi in base 2. |
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+0
34
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| 1, 1, 0, 0, 1, 0, 0, 1, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 0, 1, 1, 0, 1, 0, 1, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 1, 1, 0, 1, 0, 0, 0, 1, 1, 0, 0, 0, 0, 1, 0, 0, 0, 1, 1, 0, 1, 0, 0, 1, 1, 0, 0, 0, 1, 0, 0, 1, 1, 0, 0, 0, 1, 1, 0, 0, 1, 1, 0, 0, 0, 1, 0, 1, 0, 0, 0, 1, 0, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 1
(list; cons; graph; listen)
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OFFSET
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2,1
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COMMENT
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The 10^k_th binary digit of Pi beginning with k=0: 0,0,0,1,1,0,1,1,0, ..., . [From Robert G. Wilson v (rgwv(AT)rgwv.com), May 04 2009]
It appears to me that, if this is read as a decimal number, it is an example of an irrational number that is not normal (no '2' for example, and if it repeated or terminated, pi would too). [From Alvin H. Belt (abelt3(AT)juno.com), Jun 19 2009]
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REFERENCES
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J. P. Delahaye, Le Fascinant Nombre Pi, "100000 digits of pi in base two", pp. 209-210; Pour la Science, Paris 1997.
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LINKS
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A. Brouty, Les decimales de PI en base 2 jusqu'a 1 million
Elias's Pi Page, Binary representation of pi with 32768 digits
Steve Pagliarulo, Stu's pi page
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MATHEMATICA
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RealDigits[Pi, 2, 75][[1]]
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CROSSREFS
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Cf. A000796., A119017, A068425, A117721, A065987.
Pi in various bases: A004601 to A004608, A000796, A068436 to A068440, A062964. Cf. A007514.
Sequence in context: A113429 A133100 A077606 this_sequence A114915 A074711 A004585
Adjacent sequences: A004598 A004599 A004600 this_sequence A004602 A004603 A004604
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KEYWORD
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nonn,base,cons
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com).
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