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A010140 Continued fraction for sqrt(54). 3
7, 2, 1, 6, 1, 2, 14, 2, 1, 6, 1, 2, 14, 2, 1, 6, 1, 2, 14, 2, 1, 6, 1, 2, 14, 2, 1, 6, 1, 2, 14, 2, 1, 6, 1, 2, 14, 2, 1, 6, 1, 2, 14, 2, 1, 6, 1, 2, 14, 2, 1, 6, 1, 2, 14, 2, 1, 6, 1, 2, 14, 2, 1, 6, 1, 2, 14, 2, 1, 6, 1, 2, 14, 2, 1 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

LINKS

Harry J. Smith, Table of n, a(n) for n = 0..20000

G. Xiao, Contfrac

Index entries for continued fractions for constants

Index entries for linear recurrences with constant coefficients, signature (0, 0, 0, 0, 0, 1).

FORMULA

a(n)=(1/90)*{-124*(n mod 6)-19*[(n+1) mod 6]+41*[(n+2) mod 6]+11*[(n+3) mod 6]+71*[(n+4) mod 6]+176*[(n+5) mod 6]}-7*[C(2*n,n) mod 2], with n>=0. - Paolo P. Lava, Jul 23 2009

EXAMPLE

7.348469228349534294591852224... = 7 + 1/(2 + 1/(1 + 1/(6 + 1/(1 + ...)))). - Harry J. Smith, Jun 06 2009

MATHEMATICA

ContinuedFraction[Sqrt[54], 300] (* Vladimir Joseph Stephan Orlovsky, Mar 07 2011 *)

PROG

(PARI) { allocatemem(932245000); default(realprecision, 21000); x=contfrac(sqrt(54)); for (n=0, 20000, write("b010140.txt", n, " ", x[n+1])); } \\ Harry J. Smith, Jun 06 2009

CROSSREFS

Cf. A010507 Decimal expansion. - Harry J. Smith, Jun 06 2009

Sequence in context: A198229 A133362 A317925 * A222067 A154020 A060991

Adjacent sequences:  A010137 A010138 A010139 * A010141 A010142 A010143

KEYWORD

nonn,cofr

AUTHOR

N. J. A. Sloane

STATUS

approved

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Last modified April 8 13:10 EDT 2020. Contains 333314 sequences. (Running on oeis4.)