A289502 Mean width of the regular tetrahedron of unit length.

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

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