OFFSET
1,1
COMMENTS
Next term, if it exists, is bigger than 489 digits (the 1279th convergent to sqrt(2)).
LINKS
Andrej Dujella, Mirela Jukić Bokun, Ivan Soldo, A Pellian equation with primes and applications to D(-1)-quadruples, arXiv:1706.01959 [math.NT], 2017.
MATHEMATICA
For[n = 2, n < 1500, n++, a := Join[{1}, Table[2, {i, 2, n}]]; If[PrimeQ[Denominator[FromContinuedFraction[a]]], If[PrimeQ[Numerator[FromContinuedFraction[a]]], Print[Denominator[FromContinuedFraction[a]]]]]] (* Stefan Steinerberger, May 09 2006 *)
CROSSREFS
KEYWORD
frac,nonn
AUTHOR
Joshua Zucker, May 08 2006
STATUS
approved