A041831 -id:A041831

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A041830

Numerators of continued fraction convergents to sqrt(436).

+10
2

20, 21, 167, 355, 522, 877, 1399, 19064, 58591, 136246, 331083, 1791661, 2122744, 3914405, 17780364, 181718045, 744652544, 926370589, 1671023133, 9281486254, 20233995641, 49749477536, 169482428249

(list; graph; refs; listen; history; text; internal format)

OFFSET

0,1

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 0..200

Index entries for linear recurrences with constant coefficients, signature (0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 316141343972498, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, -1).

FORMULA

a(n) = 316141343972498*a(n-30) - a(n-60) for n>59. - Bruno Berselli, Nov 09 2013

MATHEMATICA

Numerator[Convergents[Sqrt[436], 30]] (* Vincenzo Librandi, Nov 09 2013 *)

CROSSREFS

Cf. A041831.

KEYWORD

nonn,cofr,frac,easy,less

AUTHOR

N. J. A. Sloane.

STATUS

approved

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