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A242723 Decimal expansion of 180*(1 - arctan(2)/Pi). 1
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 (list; constant; graph; refs; listen; history; text; internal format)
OFFSET
3,3
COMMENTS
Dihedral angle in degrees of regular dodecahedron.
LINKS
Wikipedia, Dodecahedron
EXAMPLE
116.5650511770779893515721937204532946712042142996452210279860163152880...
MATHEMATICA
RealDigits[180 (1 - ArcTan[2]/Pi), 10, 100, 2] (* Wesley Ivan Hurt, May 21 2014 *)
PROG
(PARI) default(realprecision, 105); x=18/10*(1-atan(2)/Pi); for(n=1, 105, d=floor(x); x=(x-d)*10; print1(d, ", "));
CROSSREFS
Cf. A137218 (same in radians).
Sequence in context: A198829 A217170 A064844 * A111718 A106154 A023408
KEYWORD
nonn,cons
AUTHOR
STATUS
approved

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Last modified March 19 06:19 EDT 2024. Contains 370953 sequences. (Running on oeis4.)