|
| |
|
|
A140272
|
|
Decimal expansion of arctan(3*sqrt(15)/29).
|
|
1
| |
|
|
3, 8, 1, 0, 6, 9, 5, 6, 8, 7, 7, 7, 5, 6, 0, 2, 6, 9, 0, 8, 1, 4, 9, 3, 4, 2, 3, 7, 9, 8, 7, 4, 2, 1, 3, 9, 3, 8, 2, 2, 4, 6, 4, 7, 9, 3, 8, 7, 7, 6, 4, 6, 9, 2, 2, 2, 8, 3, 1, 5, 6, 9, 0, 1, 3, 2, 2, 5, 4, 7, 0, 4, 9, 6, 8, 0, 9, 6, 7, 9, 2, 0, 4, 5, 5, 0, 0, 0, 2, 6, 4, 8, 8, 2, 5, 5, 4, 8, 5, 6, 1, 0, 2, 3, 2
(list; constant; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 0,1
|
|
|
COMMENTS
| The Brocard angle in radians of the obtuse scalene triangle with sides of lengths 2, 3 and 4, the scalene triangle with least integer side lengths. See formulas in the Weisstein link.
|
|
|
LINKS
| Eric Weisstein's World of Mathematics, Brocard Angle.
|
|
|
FORMULA
| arctan(3*sqrt(15)/29) = arctan(4*A140239/29) = arcsin(3*sqrt(915)/244) = arccos(29*sqrt(61)/244).
|
|
|
EXAMPLE
| 0.38106956877756026908149342379874213938224647938776469222831569013225470496...
|
|
|
PROG
| (PARI) atan(3*sqrt(15)/29)
|
|
|
CROSSREFS
| Cf. A140273, A140239.
Sequence in context: A085995 A076482 A156827 * A021728 A084185 A073227
Adjacent sequences: A140269 A140270 A140271 * A140273 A140274 A140275
|
|
|
KEYWORD
| cons,nonn
|
|
|
AUTHOR
| Rick L. Shepherd (rshepherd2(AT)hotmail.com), May 16 2008, Jul 18 2008
|
| |
|
|
