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A040614 Continued fraction for sqrt(640). 2
25, 3, 2, 1, 4, 1, 11, 1, 4, 1, 2, 3, 50, 3, 2, 1, 4, 1, 11, 1, 4, 1, 2, 3, 50, 3, 2, 1, 4, 1, 11, 1, 4, 1, 2, 3, 50, 3, 2, 1, 4, 1, 11, 1, 4, 1, 2, 3, 50, 3, 2, 1, 4, 1, 11, 1, 4, 1, 2, 3, 50, 3, 2, 1, 4, 1, 11, 1, 4, 1, 2, 3, 50, 3, 2, 1, 4, 1, 11, 1, 4, 1, 2, 3, 50, 3, 2 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

LINKS

Table of n, a(n) for n=0..86.

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, 1).

FORMULA

a(n)=(1/792)*{-3019*(n mod 12)+17*[(n+1) mod 12]+17*[(n+2) mod 12]+281*[(n+3) mod 12]-115*[(n+4) mod 12]+743*[(n+5) mod 12]-577*[(n+6) mod 12]+281*[(n+7) mod 12]-115*[(n+8) mod 12]+149*[(n+9) mod 12]+149*[(n+10) mod 12]+3185*[(n+11) mod 12]}-25*[C(2*n,n) mod 2], with n>=0 [From Paolo P. Lava, May 15 2009]

MAPLE

with(numtheory): Digits := 300: convert(evalf(sqrt(640)), confrac);

MATHEMATICA

ContinuedFraction[Sqrt[640], 100] (* or *) PadRight[{25}, 100, {50, 3, 2, 1, 4, 1, 11, 1, 4, 1, 2, 3}] (* Harvey P. Dale, Aug 19 2014 *)

CROSSREFS

Sequence in context: A040624 A040613 A040612 * A040615 A317325 A040610

Adjacent sequences:  A040611 A040612 A040613 * A040615 A040616 A040617

KEYWORD

nonn,cofr,easy

AUTHOR

N. J. A. Sloane.

STATUS

approved

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Last modified January 23 07:09 EST 2022. Contains 350506 sequences. (Running on oeis4.)