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A178809 Decimal expansion of the area of the regular 12-gon (dodecagon) of edge length 1. 10
1, 1, 1, 9, 6, 1, 5, 2, 4, 2, 2, 7, 0, 6, 6, 3, 1, 8, 8, 0, 5, 8, 2, 3, 3, 9, 0, 2, 4, 5, 1, 7, 6, 1, 7, 1, 0, 0, 8, 2, 8, 4, 1, 5, 7, 6, 1, 4, 3, 1, 1, 4, 1, 8, 8, 4, 1, 6, 7, 4, 2, 0, 9, 3, 8, 3, 5, 5, 7, 9, 9, 0, 5, 0, 7, 2, 6, 4, 0, 0, 1, 1, 1, 2, 4, 3, 4, 3, 8, 5, 6, 0, 2, 7, 1, 7, 4, 5, 7, 2, 7, 0, 2, 6, 8 (list; constant; graph; refs; listen; history; text; internal format)
OFFSET

2,4

LINKS

G. C. Greubel, Table of n, a(n) for n = 2..10000

FORMULA

Digits of 6+3*sqrt(3).

Equals 1 + A176532 = 6 + A010482.

EXAMPLE

11.196152422706631880582339024517617100828415761431141884167420938355...

MATHEMATICA

RealDigits[N[6+3*Sqrt[3], 150]][[1]]

PROG

(PARI) sqrt(27)+6 \\ Charles R Greathouse IV, Apr 25 2016

CROSSREFS

Cf. A010482, A090488, A104956, A120011, A176532.

Sequence in context: A194825 A092732 A176532 * A021108 A021840 A198582

Adjacent sequences:  A178806 A178807 A178808 * A178810 A178811 A178812

KEYWORD

cons,nonn,easy

AUTHOR

Vladimir Joseph Stephan Orlovsky, Jun 16 2010

EXTENSIONS

Offset corrected, keyword:cons inserted, formula with A176532 added - R. J. Mathar, Jun 25 2010

STATUS

approved

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Last modified February 23 13:37 EST 2020. Contains 332159 sequences. (Running on oeis4.)