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Search: id:A041221
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| A041221 |
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Denominators of continued fraction convergents to sqrt(122). |
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+0
3
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| 1, 22, 485, 10692, 235709, 5196290, 114554089, 2525386248, 55673051545, 1227332520238, 27056988496781, 596481079449420, 13149640736384021, 289888577279897882, 6390698340894137425, 140885252076950921232
(list; graph; listen)
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OFFSET
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0,2
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LINKS
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Tanya Khovanova, Recursive Sequences
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FORMULA
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a(n)=F(n, 22), the n-th Fibonacci polynomial evaluated at x=22. - T. D. Noe (noe(AT)sspectra.com), Jan 19 2006
a(n)=22*a(n-1)+a(n-2), n>1 ; a(0)=1, a(1)=22 . G.f.: 1/(1-22*x-x^2). [From Philippe DELEHAM (kolotoko(AT)wanadoo.fr), Nov 21 2008]
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MATHEMATICA
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a=0; lst={}; s=0; Do[a=s-(a-1); AppendTo[lst, a]; s+=a*22, {n, 3*4!}]; lst [From Vladimir Orlovsky (4vladimir(AT)gmail.com), Oct 27 2009]
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CROSSREFS
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Cf. A041220.
Sequence in context: A158535 A077421 A009966 this_sequence A041926 A121904 A158629
Adjacent sequences: A041218 A041219 A041220 this_sequence A041222 A041223 A041224
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KEYWORD
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nonn,cofr,easy,less
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com).
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