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A010476 Decimal expansion of square root of 20. 8
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; text; internal format)
OFFSET

1,1

COMMENTS

Continued fraction expansion is 4 followed by {2, 8} repeated. - Harry J. Smith, Jun 03 2009

LINKS

Harry J. Smith, Table of n, a(n) for n = 1..20000

FORMULA

sqrt(20) = 2*sqrt(5). - Alonso del Arte, Jun 26 2015

EXAMPLE

4.472135954999579392818347337462552470881236719223051448541794490821041... - Harry J. Smith, Jun 03 2009

MATHEMATICA

RealDigits[N[Sqrt[20], 100]][[1]] (* Vladimir Joseph Stephan Orlovsky, Feb 21 2011 *)

PROG

(PARI) { default(realprecision, 20080); x=sqrt(20); for (n=1, 20000, d=floor(x); x=(x-d)*10; write("b010476.txt", n, " ", d)); } \\ Harry J. Smith, Jun 03 2009

CROSSREFS

Except for offset, same as A020762.

Cf. A040015 (continued fraction). - Harry J. Smith, Jun 03 2009

Cf. A002163 (decimal expansion of square root of 5).

Sequence in context: A196463 A021695 A131844 * A020762 A204158 A053510

Adjacent sequences:  A010473 A010474 A010475 * A010477 A010478 A010479

KEYWORD

nonn,cons,easy

AUTHOR

N. J. A. Sloane

STATUS

approved

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Last modified January 18 04:47 EST 2019. Contains 319269 sequences. (Running on oeis4.)