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1,2

Table of n, a(n) for n=1..94.

J. Sondow, Evaluation of Tachiya's algebraic infinite products involving Fibonacci and Lucas numbers, Diophantine Analysis and Related Fields 2011 - AIP Conference Proceedings, vol. 1385, pp. 97-100.

Equals A090550 - 4. - R. J. Mathar, Oct 27 2008

Equals product_{n >=1} (1 + 1/A192222(n)). - Charles R Greathouse IV, Jun 26 2011

1.8541019662496845446137605030969143531609275394172885864063458681157...

(PARI) (sqrt(5)-1)*3/2 \\ Charles R Greathouse IV, Jun 26 2011

Cf. A001622 (decimal expansion of golden ratio), A090550 (decimal expansion of solution to n/x = x-n for n = 5), A192222 (Fibonacci(2^n + 1)).

Sequence in context: A081885 A019609 A093341 * A030437 A200290 A273959

Adjacent sequences: A134970 A134971 A134972 * A134974 A134975 A134976

cons,nonn,easy

Omar E. Pol, Nov 15 2007

approved