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A040467 Continued fraction for sqrt(490). 2
22, 7, 2, 1, 4, 4, 4, 1, 2, 7, 44, 7, 2, 1, 4, 4, 4, 1, 2, 7, 44, 7, 2, 1, 4, 4, 4, 1, 2, 7, 44, 7, 2, 1, 4, 4, 4, 1, 2, 7, 44, 7, 2, 1, 4, 4, 4, 1, 2, 7, 44, 7, 2, 1, 4, 4, 4, 1, 2, 7, 44, 7, 2, 1, 4, 4, 4, 1, 2, 7, 44, 7, 2, 1, 4, 4, 4, 1, 2, 7, 44, 7, 2, 1, 4, 4, 4, 1, 2, 7 (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, 1).

FORMULA

a(n)=(1/450)*{-1589*(n mod 10)-149*[(n+1) mod 10]+31*[(n+2) mod 10]+211*[(n+3) mod 10]+76*[(n+4) mod 10]+76*[(n+5) mod 10]-59*[(n+6) mod 10]+121*[(n+7) mod 10]+301*[(n+8) mod 10]+1741*[(n+9) mod 10]}-22*[C(2*n,n) mod 2], with n>=0 [From Paolo P. Lava, May 13 2009]

MAPLE

with(numtheory): Digits := 300: convert(evalf(sqrt(490)), confrac);

CROSSREFS

Sequence in context: A040468 A317740 A317901 * A194708 A069285 A159990

Adjacent sequences:  A040464 A040465 A040466 * A040468 A040469 A040470

KEYWORD

nonn,cofr,easy,less

AUTHOR

N. J. A. Sloane.

STATUS

approved

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Last modified October 17 21:57 EDT 2019. Contains 328134 sequences. (Running on oeis4.)