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A042257 Denominators of continued fraction convergents to sqrt(654). 2
1, 1, 2, 5, 7, 68, 75, 143, 2363, 2506, 4869, 46327, 51196, 148719, 199915, 348634, 17631615, 17980249, 35611864, 89203977, 124815841, 1212546546, 1337362387, 2549908933, 42135905315, 44685814248, 86821719563, 826081290315, 912903009878, 2651887310071 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,3
LINKS
Index entries for linear recurrences with constant coefficients, signature (0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 17831530, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, -1).
FORMULA
a(n) = 17831530*a(n-16) - a(n-32) for n>31. - Vincenzo Librandi, Jan 19 2014
MATHEMATICA
Denominator[Convergents[Sqrt[654], 30]] (* Vincenzo Librandi, Jan 19 2014 *)
CROSSREFS
Cf. A042256.
Sequence in context: A358381 A041125 A293592 * A343833 A103056 A041445
KEYWORD
nonn,frac,easy
AUTHOR
EXTENSIONS
More terms from Vincenzo Librandi, Jan 19 2014
STATUS
approved

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Last modified June 23 23:59 EDT 2024. Contains 373661 sequences. (Running on oeis4.)