A042489 - OEIS

A042489

Denominators of continued fraction convergents to sqrt(772).

1, 1, 4, 5, 9, 14, 79, 93, 172, 1297, 2766, 4063, 6829, 120156, 126985, 1643976, 1770961, 31750313, 33521274, 65271587, 164064448, 1213722723, 1377787171, 2591509894, 14335336641, 16926846535, 31262183176, 48189029711, 175829272309, 224018302020

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OFFSET

0,3

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, 12448646853698, 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) = 12448646853698*a(n-30) - a(n-60) for n>59. - Vincenzo Librandi, Jan 23 2014

MATHEMATICA

Denominator[Convergents[Sqrt[772], 30]] (* Vincenzo Librandi, Jan 23 2014 *)

CROSSREFS

Cf. A040744, A042488.

Sequence in context: A041353 A121052 A041823 * A217685 A251632 A350695

Adjacent sequences: A042486 A042487 A042488 * A042490 A042491 A042492

KEYWORD

nonn,frac,easy

AUTHOR

N. J. A. Sloane.

EXTENSIONS

More terms from Vincenzo Librandi, Jan 23 2014

STATUS

approved