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A042880 Numerators of continued fraction convergents to sqrt(972). 2
31, 156, 187, 343, 530, 4053, 24848, 28901, 111551, 140452, 2077879, 2218331, 8732872, 10951203, 74440090, 532031833, 606471923, 1138503756, 1744975679, 9863382151, 613274669041, 3076236727356 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

LINKS

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

FORMULA

a(n) = 19726764302*a(n-20) - a(n-40) for n > 39. [Bruno Berselli, Dec 08 2013]

MATHEMATICA

Numerator[Convergents[Sqrt[972], 30]] (* Vincenzo Librandi, Dec 08 2013 *)

CROSSREFS

Cf. A042881.

Sequence in context: A104049 A176922 A134553 * A042882 A045160 A142906

Adjacent sequences: A042877 A042878 A042879 * A042881 A042882 A042883

KEYWORD

nonn,cofr,frac,easy

AUTHOR

N. J. A. Sloane

STATUS

approved

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Last modified March 30 07:38 EDT 2023. Contains 361606 sequences. (Running on oeis4.)