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A010476
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Decimal expansion of square root of 20.
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5
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4, 4, 7, 2, 1, 3, 5, 9, 5, 4, 9, 9, 9, 5, 7, 9, 3, 9, 2, 8, 1, 8, 3, 4, 7, 3, 3, 7, 4, 6, 2, 5, 5, 2, 4, 7, 0, 8, 8, 1, 2, 3, 6, 7, 1, 9, 2, 2, 3, 0, 5, 1, 4, 4, 8, 5, 4, 1, 7, 9, 4, 4, 9, 0, 8, 2, 1, 0, 4, 1, 8, 5, 1, 2, 7, 5, 6, 0, 9, 7, 9, 8, 8, 2, 8, 8, 2, 8, 8, 1, 6, 7, 5, 7, 5, 6, 4, 5, 4, 9, 9, 3, 9, 0, 1
(list; constant; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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COMMENTS
| Continued fraction expansion is 4 followed by {2, 8} repeated. [From Harry J. Smith (hjsmithh(AT)sbcglobal.net), Jun 03 2009]
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LINKS
| Harry J. Smith, Table of n, a(n) for n=1,...,20000
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EXAMPLE
| 4.472135954999579392818347337462552470881236719223051448541794490821041... [From Harry J. Smith (hjsmithh(AT)sbcglobal.net), Jun 03 2009]
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MATHEMATICA
| RealDigits[N[Sqrt[20], 200]][[1]] (*From Vladimir Joseph Stephan Orlovsky, Feb 21 2011*)
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PROG
| (PARI) { default(realprecision, 20080); x=sqrt(20); for (n=1, 20000, d=floor(x); x=(x-d)*10; write("b010476.txt", n, " ", d)); } [From Harry J. Smith (hjsmithh(AT)sbcglobal.net), Jun 03 2009]
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CROSSREFS
| Except for offset, same as A020762.
Cf. A040015 Continued fraction. [From Harry J. Smith (hjsmithh(AT)sbcglobal.net), Jun 03 2009]
Sequence in context: A021695 A131844 * A020762 A204158 A053510 A197009
Adjacent sequences: A010473 A010474 A010475 * A010477 A010478 A010479
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KEYWORD
| nonn,cons
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com).
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