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A040202 Continued fraction for sqrt(217). 0
14, 1, 2, 1, 2, 1, 1, 9, 4, 9, 1, 1, 2, 1, 2, 1, 28, 1, 2, 1, 2, 1, 1, 9, 4, 9, 1, 1, 2, 1, 2, 1, 28, 1, 2, 1, 2, 1, 1, 9, 4, 9, 1, 1, 2, 1, 2, 1, 28, 1, 2, 1, 2, 1, 1, 9, 4, 9, 1, 1, 2, 1, 2, 1, 28, 1, 2, 1, 2, 1, 1, 9, 4, 9, 1, 1, 2, 1, 2, 1, 28, 1, 2, 1, 2, 1, 1, 9, 4, 9 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

LINKS

Table of n, a(n) for n=0..89.

Index entries for continued fractions for constants

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

FORMULA

a(n)=(1/320)*{-529*(n mod 16)+31*[(n+1) mod 16]-9*[(n+2) mod 16]+31*[(n+3) mod 16]-9*[(n+4) mod 16]+11*[(n+5) mod 16]+171*[(n+6) mod 16]-89*[(n+7) mod 16]+111*[(n+8) mod 16]-149*[(n+9) mod 16]+11*[(n+10) mod 16]+31*[(n+11) mod 16]-9*[(n+12) mod 16]+31*[(n+13) mod 16]-9*[(n+14) mod 16]+551*[(n+15) mod 16]}-14*[C(2*n,n) mod 2], with n>=0 [From Paolo P. Lava, Apr 23 2009]

MAPLE

with(numtheory): Digits := 300: convert(evalf(sqrt(217)), confrac);

CROSSREFS

Sequence in context: A060628 A022177 A015133 * A209601 A040201 A179948

Adjacent sequences:  A040199 A040200 A040201 * A040203 A040204 A040205

KEYWORD

nonn,cofr,easy

AUTHOR

N. J. A. Sloane.

STATUS

approved

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Last modified March 21 10:13 EDT 2019. Contains 321368 sequences. (Running on oeis4.)