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A179591 Decimal expansion of the surface area of pentagonal cupola with edge length 1. 5
1, 6, 5, 7, 9, 7, 4, 9, 7, 5, 2, 9, 8, 8, 1, 9, 7, 0, 4, 6, 0, 9, 4, 0, 4, 6, 3, 4, 4, 3, 6, 3, 2, 2, 4, 6, 1, 8, 1, 0, 2, 6, 3, 6, 0, 9, 6, 1, 1, 7, 6, 5, 5, 1, 8, 1, 8, 7, 4, 7, 4, 4, 0, 5, 7, 2, 7, 5, 9, 4, 3, 4, 8, 4, 5, 8, 2, 6, 9, 3, 5, 7, 3, 8, 2, 0, 3, 5, 8, 2, 7, 9, 0, 0, 1, 9, 1, 2, 0, 4, 8, 2, 6, 8, 1 (list; constant; graph; refs; listen; history; text; internal format)
OFFSET

2,2

COMMENTS

Pentagonal cupola: 15 vertices, 25 edges, and 12 faces.

LINKS

Table of n, a(n) for n=2..106.

Wolfram Alpha, Johnson solid 5

FORMULA

Digits of (20+sqrt(10*(80+31*sqrt(5)+sqrt(2175+930*sqrt(5)))))/4.

EXAMPLE

16.5797497529881970460940463443632246181026360961176551818747440...

MATHEMATICA

RealDigits[N[(20+Sqrt[10*(80+31*Sqrt[5]+Sqrt[2175+930*Sqrt[5]])])/4, 200]]

CROSSREFS

Cf. A001622, A010527, A102208, A179290, A179292, A179294, A179449, A179450, A179451, A179452, A179552, A179553, A019881, A179587, A179588, A179589, A179590.

Sequence in context: A191102 A021156 A182448 * A063046 A104909 A266077

Adjacent sequences:  A179588 A179589 A179590 * A179592 A179593 A179594

KEYWORD

nonn,cons,easy

AUTHOR

Vladimir Joseph Stephan Orlovsky, Jul 19 2010

STATUS

approved

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Last modified November 18 12:35 EST 2019. Contains 329261 sequences. (Running on oeis4.)