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A041410
Numerators of continued fraction convergents to sqrt(220).
2
14, 15, 74, 89, 2566, 2655, 13186, 15841, 456734, 472575, 2347034, 2819609, 81296086, 84115695, 417758866, 501874561, 14470246574, 14972121135, 74358731114, 89330852249, 2575622594086, 2664953446335
OFFSET
0,1
FORMULA
From Colin Barker, Jul 16 2012: (Start)
a(n) = 178*a(n-4) - a(n-8).
G.f.: -(x^7-14*x^6+15*x^5-74*x^4-89*x^3-74*x^2-15*x-14)/(x^8-178*x^4+1). (End)
MATHEMATICA
Numerator/@Convergents[Sqrt[220], 25] (* Harvey P. Dale, May 15 2011 *)
CROSSREFS
Cf. A041411.
Sequence in context: A174924 A041408 A041406 * A372335 A041412 A041414
KEYWORD
nonn,cofr,frac,easy
STATUS
approved