A041858 - OEIS

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A041858

Numerators of continued fraction convergents to sqrt(451).

21, 85, 361, 807, 6817, 143964, 1158529, 2461022, 11002617, 46471490, 1962805197, 7897692278, 33553574309, 75004840896, 633592301477, 13380443171913, 107677137676781, 228734718525475, 1022616011778681

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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, 92942980, 0, 0, 0, 0, 0, 0, 0, 0, 0, -1).

FORMULA

a(n) = 92942980*a(n-10) - a(n-20). - Wesley Ivan Hurt, Jan 20 2024

MATHEMATICA

Numerator[Convergents[Sqrt[451], 30]] (* Vincenzo Librandi, Nov 11 2013 *)

CROSSREFS

Cf. A041859.

Sequence in context: A116972 A221475 A277356 * A217549 A063651 A220613

Adjacent sequences: A041855 A041856 A041857 * A041859 A041860 A041861

KEYWORD

nonn,cofr,frac,easy,less

AUTHOR

N. J. A. Sloane.

STATUS

approved