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 A179452 Decimal expansion of sqrt(5 + 2*sqrt(5))/2, the height of a regular pentagon and midradius of an icosidodecahedron with side length 1. 16
 1, 5, 3, 8, 8, 4, 1, 7, 6, 8, 5, 8, 7, 6, 2, 6, 7, 0, 1, 2, 8, 5, 1, 4, 5, 2, 8, 8, 0, 1, 8, 4, 5, 4, 9, 1, 2, 0, 0, 3, 3, 5, 1, 0, 7, 1, 7, 6, 8, 8, 9, 6, 2, 1, 3, 5, 1, 9, 5, 7, 8, 1, 2, 5, 1, 8, 7, 4, 3, 1, 6, 4, 4, 2, 4, 7, 5, 4, 5, 4, 5, 9, 2, 2, 7, 2, 9, 6, 8, 6, 0, 8, 3, 3, 5, 5, 2, 7, 1, 7, 6, 3, 5, 9, 5 (list; constant; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Icosidodecahedron: 32 faces, 30 vertices, and 60 edges. Height of a regular pentagon with side length 1. - Jared Kish, Oct 16 2014 LINKS Eric Weisstein's World of Mathematics, Icosidodecahedron Eric Weisstein's World of Mathematics, Pentagon FORMULA Equals sqrt(5+2*sqrt(5))/2. EXAMPLE 1.53884176858762670128514528801845491200335107176889621351957812518743... MAPLE sqrt(5+2*sqrt(5.))/2 MATHEMATICA RealDigits[Sqrt[5+2Sqrt[5]]/2, 10, 120][[1]] (* Harvey P. Dale, Jun 23 2017 *) PROG (PARI) sqrt(5+2*sqrt(5))/2 CROSSREFS Cf. A010527, A102208, A179290, A179292, A179294, A179449, A179450, A179451. Sequence in context: A161488 A010484 A174930 * A079810 A300884 A092748 Adjacent sequences:  A179449 A179450 A179451 * A179453 A179454 A179455 KEYWORD nonn,cons,easy AUTHOR Vladimir Joseph Stephan Orlovsky, Jul 14 2010 EXTENSIONS Partially rewritten by Charles R Greathouse IV, Feb 03 2011 Edited by M. F. Hasler, Oct 16 2014 STATUS approved

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Last modified October 17 04:09 EDT 2019. Contains 328106 sequences. (Running on oeis4.)