OFFSET
1,1
COMMENTS
Continued fraction expansion of (45+21*sqrt(5))/10 is A010720 preceded by 9.
Quadratic number with denominator 5 and minimal polynomial 5x^2 - 45x - 9. - Charles R Greathouse IV, Apr 25 2016
EXAMPLE
(45+21*sqrt(5))/10 = 9.19574275274955836245...
MATHEMATICA
RealDigits[(45+21*Sqrt[5])/10, 10, 120][[1]] (* Harvey P. Dale, Aug 24 2012 *)
PROG
(PARI) (21*sqrt(5)+45)/10 \\ Charles R Greathouse IV, Apr 25 2016
CROSSREFS
KEYWORD
cons,nonn
AUTHOR
Klaus Brockhaus, Apr 23 2010
STATUS
approved