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A071866
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Number of elements in the continued fraction for prime(n+1)/prime(n).
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9
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2, 3, 3, 4, 3, 3, 3, 4, 4, 3, 3, 3, 3, 4, 4, 4, 3, 3, 4, 3, 3, 4, 4, 3, 3, 3, 4, 3, 3, 3, 4, 4, 3, 4, 3, 3, 3, 4, 4, 4, 3, 3, 3, 3, 3, 6, 6, 4, 3, 3, 4, 3, 3, 4, 4, 4, 3, 3, 3, 3, 4, 4, 4, 3, 3, 6, 3, 5, 3, 3, 4, 4, 3, 3, 4, 4, 6, 3, 3, 4, 3, 3, 3, 3, 4, 4, 3, 3, 3, 4, 4, 4, 4, 5, 4, 4, 5, 3, 3, 3, 5, 4, 4, 3, 3
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OFFSET
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1,1
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LINKS
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EXAMPLE
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prime(5)/prime(4) = 11/7, 11/7 continued fraction is [1, 1, 1, 3] which contains 4 elements, hence a(4)=4.
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MAPLE
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seq(nops(convert(ithprime(n+1)/ithprime(n), confrac)), n=1..200); # Robert Israel, May 29 2018
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MATHEMATICA
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Table[Length[ContinuedFraction[Prime[n + 1]/Prime[n]]], {n, 105}] - Ray Chandler, Sep 18 2005
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PROG
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(PARI) for(n=1, 200, print1(length(contfrac(prime(n+1)/prime(n))), ", "))
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CROSSREFS
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KEYWORD
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easy,nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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