A242723 Decimal expansion of 180*(1 - arctan(2)/Pi).

1, 1, 6, 5, 6, 5, 0, 5, 1, 1, 7, 7, 0, 7, 7, 9, 8, 9, 3, 5, 1, 5, 7, 2, 1, 9, 3, 7, 2, 0, 4, 5, 3, 2, 9, 4, 6, 7, 1, 2, 0, 4, 2, 1, 4, 2, 9, 9, 6, 4, 5, 2, 2, 1, 0, 2, 7, 9, 8, 6, 0, 1, 6, 3, 1, 5, 2, 8, 8, 0, 6, 5, 8, 2, 1, 4, 8, 4, 7, 4, 0, 6, 1, 1, 7, 0, 8, 5, 7, 3, 8, 1, 0, 6, 0, 2, 1, 6, 4, 7, 2, 1, 3, 1, 0

Offset: 3

Author

Arkadiusz Wesolowski, May 21 2014

Keywords

• nonn
• cons

Comments

Dihedral angle in degrees of regular dodecahedron.

Examples

			116.5650511770779893515721937204532946712042142996452210279860163152880...
		

Links

• Wikipedia, Dodecahedron

Crossrefs

Cf. A137218 (same in radians).

Programs

Mathematica

RealDigits[180 (1 - ArcTan[2]/Pi), 10, 100, 2] (* Wesley Ivan Hurt, May 21 2014 *)

PARI

default(realprecision, 105); x=18/10*(1-atan(2)/Pi); for(n=1, 105, d=floor(x); x=(x-d)*10; print1(d, ", "));