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A128298 a(n) = denominator of b(n): b(1)=1; b(n+1) = [b(1);b(2),...,b(n)]/b(n), where [...] is a continued fraction of rational terms. 1
1, 1, 1, 6, 35, 5772, 88530295, 13109586855583296, 641514040130247702993686238424885, 38794682422831176556784792608495170681619094988640304687341019712 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,4

LINKS

Table of n, a(n) for n=1..10.

EXAMPLE

a(6) = the denominator of b(6). b(6) = (1 +1/(1 +1/(2 +1/(5/6 +35/74))))*35/74 = 4735/5772.

MATHEMATICA

a = {1}; Do[AppendTo[a, FromContinuedFraction[a]/a[[ -1]]], {10}]; Denominator[a] (* Stefan Steinerberger, Oct 24 2007 *)

CROSSREFS

Cf. A128297.

Sequence in context: A192999 A193000 A193001 * A059059 A304255 A050112

Adjacent sequences:  A128295 A128296 A128297 * A128299 A128300 A128301

KEYWORD

frac,nonn

AUTHOR

Leroy Quet, Feb 25 2007

EXTENSIONS

More terms from Stefan Steinerberger, Oct 24 2007

STATUS

approved

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Last modified September 20 05:37 EDT 2021. Contains 347577 sequences. (Running on oeis4.)