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A040405 Continued fraction for sqrt(426). 2
20, 1, 1, 1, 3, 2, 6, 2, 3, 1, 1, 1, 40, 1, 1, 1, 3, 2, 6, 2, 3, 1, 1, 1, 40, 1, 1, 1, 3, 2, 6, 2, 3, 1, 1, 1, 40, 1, 1, 1, 3, 2, 6, 2, 3, 1, 1, 1, 40, 1, 1, 1, 3, 2, 6, 2, 3, 1, 1, 1, 40, 1, 1, 1, 3, 2, 6, 2, 3, 1, 1, 1, 40, 1, 1, 1, 3, 2, 6, 2, 3, 1, 1, 1, 40, 1, 1, 1, 3, 2 (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, 1).

FORMULA

a(n)=(1/396)*{-1256*(n mod 12)+31*[(n+1) mod 12]+31*[(n+2) mod 12]+97*[(n+3) mod 12]-2*[(n+4) mod 12]+163*[(n+5) mod 12]-101*[(n+6) mod 12]+64*[(n+7) mod 12]-35*[(n+8) mod 12]+31*[(n+9) mod 12]+31*[(n+10) mod 12]+1318*[(n+11) mod 12]}-20*[C(2*n,n) mod 2], with n>=0 [From Paolo P. Lava, Apr 30 2009]

MAPLE

with(numtheory): Digits := 300: convert(evalf(sqrt(426)), confrac);

CROSSREFS

Sequence in context: A198800 A060430 A040404 * A040406 A040403 A040402

Adjacent sequences:  A040402 A040403 A040404 * A040406 A040407 A040408

KEYWORD

nonn,cofr,easy

AUTHOR

N. J. A. Sloane.

STATUS

approved

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Last modified April 19 04:19 EDT 2019. Contains 322237 sequences. (Running on oeis4.)