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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
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
Sequence in context: A065482 A323481 A319638 * A054241 A277320 A343399
KEYWORD
cons,nonn,easy
AUTHOR
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.)