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 A179637 Decimal expansion of the surface area of pentagonal rotunda with edge length 1. 4
 2, 2, 3, 4, 7, 2, 0, 0, 2, 6, 5, 3, 9, 4, 1, 2, 8, 2, 7, 6, 7, 9, 8, 4, 1, 4, 1, 5, 8, 1, 8, 8, 6, 1, 3, 0, 7, 3, 8, 1, 8, 0, 1, 3, 5, 1, 3, 4, 3, 1, 6, 2, 2, 6, 1, 2, 9, 7, 9, 9, 7, 6, 3, 1, 6, 7, 1, 0, 2, 0, 4, 7, 1, 6, 7, 6, 3, 5, 2, 4, 7, 7, 6, 8, 3, 3, 9, 9, 7, 2, 1, 9, 3, 8, 6, 4, 1, 1, 4, 7, 0, 3, 3, 2, 0 (list; constant; graph; refs; listen; history; text; internal format)
 OFFSET 2,1 COMMENTS Pentagonal rotunda: 20 vertices, 35 edges, and 17 faces. LINKS Table of n, a(n) for n=2..106. Wolfram Alpha, Johnson solid 6 FORMULA Digits of sqrt(5*(145+58*sqrt(5)+2*sqrt(30*(65+29*sqrt(5)))))/2. EXAMPLE 22.3472002653941282767984141581886130738180135134316226129799763167102... MATHEMATICA RealDigits[N[Sqrt[5*(145+58*Sqrt[5]+2*Sqrt[30*(65+29*Sqrt[5])])]/2, 200]] CROSSREFS Cf. A001622, A010527, A102208, A179290, A179292, A179294, A179449-A179452, A179552-A179554, A179587-A179593. Sequence in context: A065482 A323481 A319638 * A054241 A277320 A343399 Adjacent sequences: A179634 A179635 A179636 * A179638 A179639 A179640 KEYWORD cons,nonn,easy AUTHOR Vladimir Joseph Stephan Orlovsky, Jul 21 2010 EXTENSIONS Offset corrected by R. J. Mathar, Aug 15 2010 STATUS approved

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Last modified June 17 13:47 EDT 2024. Contains 373445 sequences. (Running on oeis4.)