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A289502 Mean width of the regular tetrahedron of unit length. 0
9, 1, 2, 2, 6, 0, 1, 7, 1, 9, 5, 4, 0, 8, 9, 0, 9, 4, 7, 4, 3, 7, 1, 6, 6, 6, 1, 1, 6, 6, 3, 5, 3, 6, 3, 3, 0, 2, 5, 0, 5, 7, 0, 2, 5, 8, 4, 0, 8, 9, 9, 5, 6, 9, 0, 6, 8, 0, 9, 2, 5, 5, 2, 9, 6, 6, 9, 9, 7, 8, 8, 6, 9, 8, 3, 8, 3, 6, 6, 2, 9, 6, 9, 4, 6, 8, 2 (list; constant; graph; refs; listen; history; text; internal format)
OFFSET

0,1

LINKS

Table of n, a(n) for n=0..86.

S. R. Finch, Mean width of a regular simplex, arxiv:1111.4976 [math.MG] (2016), E(w_3).

FORMULA

Equals A156546*A093582.

MAPLE

x := 3*arccos(-1/3)/2/Pi ; evalf(%) ;

MATHEMATICA

RealDigits[3 ArcCos[-1/3]/(2*Pi), 10, 87][[1]] (* Indranil Ghosh, Jul 08 2017 *)

CROSSREFS

Sequence in context: A010166 A186116 A242627 * A010165 A177273 A176521

Adjacent sequences:  A289499 A289500 A289501 * A289503 A289504 A289505

KEYWORD

cons,nonn

AUTHOR

R. J. Mathar, Jul 07 2017

STATUS

approved

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Last modified April 6 15:05 EDT 2020. Contains 333276 sequences. (Running on oeis4.)