This site is supported by donations to The OEIS Foundation.

Annual Appeal: Please make a donation (tax deductible in USA) to keep the OEIS running. Over 5000 articles have referenced us, often saying "we discovered this result with the help of the OEIS".

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A195698 Decimal expansion of arccos(-sqrt(1/3)). 1
 2, 1, 8, 6, 2, 7, 6, 0, 3, 5, 4, 6, 5, 2, 8, 3, 9, 6, 0, 2, 9, 8, 7, 8, 6, 2, 8, 0, 7, 6, 3, 7, 4, 5, 1, 2, 9, 9, 5, 3, 7, 5, 4, 7, 0, 4, 3, 6, 5, 1, 0, 0, 3, 3, 0, 0, 1, 5, 2, 4, 6, 4, 6, 2, 9, 8, 5, 9, 0, 4, 3, 6, 0, 3, 8, 2, 2, 3, 2, 5, 4, 3, 2, 4, 0, 6, 4, 3, 2, 2, 2, 7, 5, 6, 4, 8, 8, 9, 9, 4 (list; constant; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Dihedral angle between mixed type faces of the truncated octahedron. - R. J. Mathar, Mar 24 2012 LINKS Wikipedia, Truncated Octahedron EXAMPLE arccos(-1/sqrt(3))=2.1862760354... MATHEMATICA (See A195695.) CROSSREFS Sequence in context: A108084 A108085 A272983 * A193908 A193904 A154897 Adjacent sequences:  A195695 A195696 A195697 * A195699 A195700 A195701 KEYWORD nonn,cons AUTHOR Clark Kimberling, Sep 23 2011 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.