|
|
A177037
|
|
Decimal expansion of (9 + 2*sqrt(39))/15.
|
|
1
|
|
|
1, 4, 3, 2, 6, 6, 6, 3, 9, 9, 7, 8, 6, 4, 5, 3, 0, 9, 4, 1, 1, 2, 9, 1, 9, 0, 8, 2, 7, 9, 1, 9, 7, 2, 5, 9, 4, 8, 0, 9, 7, 2, 7, 9, 9, 7, 0, 6, 5, 5, 5, 4, 1, 7, 4, 4, 6, 0, 3, 9, 6, 2, 5, 7, 4, 1, 4, 6, 1, 4, 8, 2, 6, 7, 4, 4, 4, 6, 8, 6, 0, 0, 0, 8, 4, 4, 4, 4, 8, 1, 4, 9, 6, 2, 8, 4, 5, 4, 1, 1, 6, 1, 4, 3, 7
(list;
constant;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,2
|
|
COMMENTS
|
Continued fraction expansion of (9 + 2*sqrt(39))/15 is A010883.
The positive solution to 15*x^2 - 18*x - 5 = 0. - Michal Paulovic, Feb 23 2023
|
|
LINKS
|
|
|
FORMULA
|
Equals sqrt(1/3 + (6/5) * sqrt(1/3 + (6/5) * sqrt(1/3 + (6/5) * ...))). - Michal Paulovic, Feb 23 2023
|
|
EXAMPLE
|
1.43266639978645309411...
|
|
MAPLE
|
|
|
MATHEMATICA
|
RealDigits[(9+2*Sqrt[39])/15, 10, 120][[1]] (* Harvey P. Dale, Feb 12 2013 *)
|
|
PROG
|
(PARI) my(c=(9+2*quadgen(4*39))/15); a_vector(len) = digits(floor(c*10^(len-1)));
|
|
CROSSREFS
|
Cf. A010493 (decimal expansion of sqrt(39)), A010883 (repeat 1, 2, 3, 4).
|
|
KEYWORD
|
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|