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A041612 Numerators of continued fraction convergents to sqrt(325). 3
18, 649, 23382, 842401, 30349818, 1093435849, 39394040382, 1419278889601, 51133434066018, 1842222905266249, 66371158023650982, 2391203911756701601, 86149711981264908618, 3103780835237293411849, 111822259780523827735182, 4028705132934095091878401 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,1
LINKS
Tanya Khovanova, Recursive Sequences
FORMULA
From Philippe Deléham, Nov 23 2008: (Start)
a(n) = 36*a(n-1) + a(n-2), n > 1; a(0)=18, a(1)=649.
G.f.: (18+x)/(1-36*x-x^2). (End)
MATHEMATICA
Numerator[Convergents[Sqrt[325], 30]] (* Vincenzo Librandi, Nov 04 2013 *)
CROSSREFS
Cf. A041613.
Sequence in context: A003298 A049869 A041615 * A046674 A073421 A346216
KEYWORD
nonn,cofr,frac,easy
AUTHOR
EXTENSIONS
Additional term from Colin Barker, Nov 09 2013
STATUS
approved

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Last modified March 3 20:15 EST 2024. Contains 370512 sequences. (Running on oeis4.)