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A066932
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a(n) is the denominator of b(n) where b(n)=1/b(n-1)+1/b(n-2) with b(1)=1 and b(2)=2.
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3
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1, 1, 2, 6, 21, 224, 10848, 4843293, 98262557120, 989063619297120960, 197348115975871052843094930213, 380244324677612882673067751880150651746235378560
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,3
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COMMENTS
| lim_{n->infty} b(n)=sqrt(2) with geometric convergence since abs(b(n)-sqrt(2))<2*2^(-n/2)
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FORMULA
| a(n+1)=A057677(n)*A057677(n-1) - Benoit Cloitre (benoit7848c(AT)orange.fr), Oct 25 2005
a(n) is the numerator of b(n) where b(n)=1/(b(n-1)+ b(n-2)) with b(1)=1 and b(2)=2 [From Mark Dols (markdols99(AT)yahoo.com), Jul 17 2009]
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CROSSREFS
| Cf. A057677.
Sequence in context: A126060 A110306 A028936 * A181754 A084392 A156155
Adjacent sequences: A066929 A066930 A066931 * A066933 A066934 A066935
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KEYWORD
| nonn,frac
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AUTHOR
| Zak Seidov (zakseidov(AT)yahoo.com), Oct 24 2002
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EXTENSIONS
| Edited by Benoit Cloitre, Oct 25 2005
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