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A131594 Decimal expansion of sqrt(2)/3, the volume of a regular octahedron with edge length 1. 8
4, 7, 1, 4, 0, 4, 5, 2, 0, 7, 9, 1, 0, 3, 1, 6, 8, 2, 9, 3, 3, 8, 9, 6, 2, 4, 1, 4, 0, 3, 2, 3, 2, 6, 9, 2, 8, 5, 6, 5, 5, 7, 2, 9, 1, 7, 9, 2, 3, 1, 6, 0, 2, 4, 3, 9, 2, 2, 2, 6, 5, 7, 9, 3, 3, 0, 2, 4, 4, 1, 5, 9, 4, 8, 7, 3, 6, 9, 0, 1, 2, 9, 5, 0, 1, 2, 9, 1, 7, 8, 1, 0, 9, 2, 1, 3, 8, 5, 7, 5, 7, 8, 3, 3, 7 (list; constant; graph; refs; listen; history; text; internal format)
OFFSET

0,1

COMMENTS

Volume of a regular octahedron: V = ((sqrt(2))/3)* a^3, where 'a' is the edge.

LINKS

Ivan Panchenko, Table of n, a(n) for n = 0..1000

Wikipedia, Platonic solid

FORMULA

Equals A002193/3 = A010464/A010482. [From R. J. Mathar, Dec 11 2009]

EXAMPLE

0.471404520791031682933896...

MATHEMATICA

RealDigits[Sqrt[2]/3, 10, 120][[1]] (* Harvey P. Dale, May 27 2012 *)

CROSSREFS

Cf. A020829 (regular tetrahedron volume), A102208 (regular icosahedron volume), A102769 (regular dodecahedron volume).

Cf. A179587.

Sequence in context: A256507 A123734 A011519 * A100402 A135004 A086234

Adjacent sequences:  A131591 A131592 A131593 * A131595 A131596 A131597

KEYWORD

cons,easy,nonn

AUTHOR

Omar E. Pol, Aug 30 2007

EXTENSIONS

More digits from R. J. Mathar, Dec 11 2009

STATUS

approved

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Last modified May 24 18:18 EDT 2017. Contains 286997 sequences.