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A247412 Decimal expansion of the tetrahedral angle (in degrees). 2
1, 0, 9, 4, 7, 1, 2, 2, 0, 6, 3, 4, 4, 9, 0, 6, 9, 1, 3, 6, 9, 2, 4, 5, 9, 9, 9, 3, 3, 9, 9, 6, 2, 4, 3, 5, 9, 6, 3, 0, 0, 6, 8, 4, 3, 1, 0, 0, 9, 0, 7, 9, 4, 8, 2, 8, 8, 1, 7, 1, 1, 0, 6, 3, 5, 6, 0, 3, 9, 7, 4, 6, 4, 3, 8, 0, 6, 0 (list; constant; graph; refs; listen; history; text; internal format)
OFFSET

3,3

COMMENTS

Angle between chemical bonds in the sp^3 hybridization scheme.

Angle between any two non-parallel bonds in a diamond crystal.

For its value in radians and further comments, see A156546.

LINKS

Stanislav Sykora, Table of n, a(n) for n = 3..2000

EXAMPLE

109.4712206344906913692459993399624359630068431009079482881711063560...

MATHEMATICA

RealDigits[N[ArcCos[-1/3]*180/Pi, 100]][[1]] (* Vaclav Kotesovec, Sep 17 2014 *)

PROG

(PARI) acos(-1/3)*180/Pi

CROSSREFS

Cf. A156546.

Sequence in context: A199054 A131109 A267315 * A154397 A116186 A011113

Adjacent sequences:  A247409 A247410 A247411 * A247413 A247414 A247415

KEYWORD

nonn,cons,easy

AUTHOR

Stanislav Sykora, Sep 16 2014

STATUS

approved

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Last modified May 22 20:08 EDT 2017. Contains 286906 sequences.