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A020829 Decimal expansion of 1/sqrt(72) = 1/(3*2^(3/2)) = sqrt(2)/12. 7
1, 1, 7, 8, 5, 1, 1, 3, 0, 1, 9, 7, 7, 5, 7, 9, 2, 0, 7, 3, 3, 4, 7, 4, 0, 6, 0, 3, 5, 0, 8, 0, 8, 1, 7, 3, 2, 1, 4, 1, 3, 9, 3, 2, 2, 9, 4, 8, 0, 7, 9, 0, 0, 6, 0, 9, 8, 0, 5, 6, 6, 4, 4, 8, 3, 2, 5, 6, 1, 0, 3, 9, 8, 7, 1, 8, 4, 2, 2, 5, 3, 2, 3, 7, 5, 3, 2, 2, 9, 4, 5, 2, 7, 3, 0, 3, 4, 6, 4 (list; constant; graph; refs; listen; history; text; internal format)
OFFSET

0,3

COMMENTS

Volume of regular tetrahedron with unit edge. - Stanislav Sykora, May 31 2012

LINKS

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

Wikipedia, Tetrahedron

Wikipedia, Platonic solid

EXAMPLE

0.117851130197757920733474...

CROSSREFS

Cf. A131594 (regular octahedron volume), A102208 (regular icosahedron volume), A102769 (regular dodecahedron volume).

Sequence in context: A256920 A195340 A019794 * A109916 A277053 A076415

Adjacent sequences:  A020826 A020827 A020828 * A020830 A020831 A020832

KEYWORD

nonn,cons

AUTHOR

N. J. A. Sloane

STATUS

approved

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Last modified May 27 16:49 EDT 2017. Contains 287207 sequences.