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A042073
Denominators of continued fraction convergents to sqrt(560).
2
1, 1, 2, 3, 140, 143, 283, 426, 19879, 20305, 40184, 60489, 2822678, 2883167, 5705845, 8589012, 400800397, 409389409, 810189806, 1219579215, 56910833696, 58130412911, 115041246607, 173171659518, 8080937584435, 8254109243953, 16335046828388, 24589156072341
OFFSET
0,3
FORMULA
G.f.: -(x^2-x-1)*(x^4+3*x^2+1) / ((x^4-12*x^2+1)*(x^4+12*x^2+1)). - Colin Barker, Dec 01 2013
MATHEMATICA
Denominator[Convergents[Sqrt[560], 30]] (* Vincenzo Librandi, Jan 13 2014 *)
CROSSREFS
Sequence in context: A057738 A234999 A254787 * A124236 A371272 A115231
KEYWORD
nonn,cofr,frac,easy
AUTHOR
EXTENSIONS
More terms from Colin Barker, Dec 01 2013
STATUS
approved