A179641 Decimal expansion of the volume of pentagonal dipyramid with edge length 1.

6, 0, 3, 0, 0, 5, 6, 6, 4, 7, 9, 1, 6, 4, 9, 1, 4, 1, 3, 6, 7, 4, 3, 1, 1, 3, 9, 0, 6, 0, 9, 3, 9, 6, 8, 6, 2, 8, 6, 7, 1, 8, 1, 9, 6, 6, 3, 4, 2, 9, 3, 8, 1, 0, 3, 5, 5, 9, 0, 8, 1, 0, 3, 7, 8, 4, 2, 1, 0, 0, 7, 7, 1, 3, 6, 4, 8, 3, 7, 4, 1, 6, 1, 7, 8, 6, 7, 8, 6, 7, 3, 6, 4, 8, 9, 8, 5, 2, 2, 9, 1, 4, 1, 2, 5

Offset

0,1

Comments

Pentagonal dipyramid: 7 vertices, 15 edges, and 10 faces.

Links

Table of n, a(n) for n=0..104.

Wolfram Alpha, Johnson solid 13

Formula

Digits of (5+sqrt(5))/12.

Example

0.60300566479164914136743113906093968628671819663429381035590810378421...

Mathematica

RealDigits[N[(5+Sqrt[5])/12, 200]]

Prog

(PARI) (sqrt(5)+5)/12 \\ Charles R Greathouse IV, Apr 25 2016

Crossrefs

Cf. A001622, A010527, A102208, A179290, A179292, A179294, A179449-A179452, A179552-A179554, A179587-A179593, A179637-A179640.

Sequence in context: A075092 A152244 A283634 * A110993 A262697 A237421

Adjacent sequences: A179638 A179639 A179640 * A179642 A179643 A179644

Keyword

cons,nonn,easy

Author

Vladimir Joseph Stephan Orlovsky, Jul 21 2010

Extensions

Offset corrected by R. J. Mathar, Aug 15 2010

Status

approved