OFFSET
1,2
COMMENTS
Used in a formula for a regular octahedron, a = 3^(1/3)/2^(1/6) * V^(1/3), where a is the edge length and V^(1/3) is the cube root of the volume.
An algebraic number of degree 6 and denominator 2; minimal polynomial is 2x^6 - 9. - Charles R Greathouse IV, Apr 18 2016
LINKS
Chai Wah Wu, Table of n, a(n) for n = 1..10000
Wikipedia, Octahedron
EXAMPLE
1.2848982934253252956716...
MAPLE
Digits:=100: evalf(3^(1/3)/2^(1/6));
MATHEMATICA
RealDigits[N[3^(1/3)/2^(1/6), 100]]
PROG
(PARI) 3^(1/3) / 2^(1/6) \\ Altug Alkan, Apr 15 2016
(PARI) sqrtn(9/2, 6) \\ Charles R Greathouse IV, Apr 18 2016
CROSSREFS
KEYWORD
AUTHOR
Wesley Ivan Hurt, Apr 15 2016
STATUS
approved