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 A208899 Decimal expansion of sqrt(5)/3 . 0
 7, 4, 5, 3, 5, 5, 9, 9, 2, 4, 9, 9, 9, 2, 9, 8, 9, 8, 8, 0, 3, 0, 5, 7, 8, 8, 9, 5, 7, 7, 0, 9, 2, 0, 7, 8, 4, 8, 0, 2, 0, 6, 1, 1, 9, 8, 7, 0, 5, 0, 8, 5, 7, 4, 7, 5, 6, 9, 6, 5, 7, 4, 8, 4, 7, 0, 1, 7, 3, 6, 4, 1, 8, 7, 9, 2, 6, 8, 2, 9, 9, 8, 0, 4, 8, 0, 4, 8, 0, 2, 7, 9, 2, 9, 2, 7, 4, 2, 4, 9 (list; constant; graph; refs; listen; history; text; internal format)
 OFFSET 0,1 COMMENTS Equals the absolute value of the cosine of the dihedral angle between two adjacent faces of the regular icosahedron. LINKS Wikipedia, Exsphere FORMULA Equals A002163/3 = 20*A020837/3 EXAMPLE 0.7453559924... CROSSREFS Sequence in context: A011475 A180078 A019685 * A087491 A019899 A085662 Adjacent sequences:  A208896 A208897 A208898 * A208900 A208901 A208902 KEYWORD nonn,cons,easy AUTHOR R. J. Mathar, Mar 03 2012 STATUS approved

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