A247412 Decimal expansion of the tetrahedral angle (in degrees).

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

Offset: 3

Author

Stanislav Sykora, Sep 16 2014

Keywords

• nonn
• cons
• easy

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.

Examples

			109.4712206344906913692459993399624359630068431009079482881711063560...
		

Links

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

Crossrefs

Cf. A156546.

Programs

Mathematica

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

PARI

acos(-1/3)*180/Pi