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A041887
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Denominators of continued fraction convergents to sqrt(465).
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2
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1, 1, 2, 7, 16, 39, 94, 321, 415, 736, 31327, 32063, 63390, 222233, 507856, 1237945, 2983746, 10189183, 13172929, 23362112, 994381633, 1017743745, 2012125378, 7054119879, 16120365136, 39294850151, 94710065438, 323425046465, 418135111903, 741560158368
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OFFSET
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0,3
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LINKS
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Index entries for linear recurrences with constant coefficients, signature (0,0,0,0,0,0,0,0,0,31742,0,0,0,0,0,0,0,0,0,-1).
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FORMULA
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G.f.: -(x^18 -x^17 +2*x^16 -7*x^15 +16*x^14 -39*x^13 +94*x^12 -321*x^11 +415*x^10 -736*x^9 -415*x^8 -321*x^7 -94*x^6 -39*x^5 -16*x^4 -7*x^3 -2*x^2 -x -1) / (x^20 -31742*x^10 +1). - Colin Barker, Nov 26 2013
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MATHEMATICA
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PROG
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(Magma) I:=[1, 1, 2, 7, 16, 39, 94, 321, 415, 736, 31327, 32063, 63390, 222233, 507856, 1237945, 2983746, 10189183, 13172929, 23362112]; [n le 20 select I[n] else 31742*Self(n-10)-Self(n-20): n in [1..40]]; // Vincenzo Librandi, Dec 26 2013
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CROSSREFS
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KEYWORD
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nonn,frac,easy
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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