The OEIS is supported by the many generous donors to the OEIS Foundation.

 Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 60, we have over 367,000 sequences, and we’ve crossed 11,000 citations (which often say “discovered thanks to the OEIS”). Other ways to Give
 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 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 Volume of a regular decagonal prism with unit side length and height 2. - Wesley Ivan Hurt, May 04 2021 LINKS Table of n, a(n) for n=1..105. Eric Weisstein's World of Mathematics, Icosidodecahedron Eric Weisstein's World of Mathematics, Pentagon Index entries for algebraic numbers, degree 4 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 A337440 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

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

Last modified December 2 09:50 EST 2023. Contains 367517 sequences. (Running on oeis4.)